This battery holder contains 3x 5V port and 3x 3.3V port, USB output (on off button) and USB micro input for charging (I use this to charge the battery holder) sensor. [08:18:48][D][adc:056]: adc_sensor: Got voltage=0.52V documentation for others to copy. All options from Sensor. J. M. Hopkins has added a new log for Eurorack Mute Sequencer. I use a similar battery shield to you and by adding a 220K resistor between the battery (B+) positive terminal via the blue line to the A0 it divides the voltage so it doesnt damage the Wemos and then I can multiply the voltage in my case by 5.18 to give the value I get if I hold a voltage meter between the terminal B -(battery ground by the white line) and B+. Defaults to 0x40. GND It was too difficult to get a reliable measurement. After flashing the firmware, the device ESP MCU will connect to the Wi-Fi network and will be online in the ESPHome Dashboard. I used a INA219 (High Side DC Voltage and Current I2C Module). p.s. When the voltage measured by voltmeter across the 18650 is 4.2v the wemos gets 0.868v. Instructions for setting up built-in analog voltage sensors. If you put the 18650 in the wrong way around it could destroy it. This is my yaml file and all look working fine but if I compare with my portable display which I got with my smart meter, readings not match at all. address (Optional, int): Manually specify the IC address of the sensor. ESPHome ESPHome Platforms Core Components Sensor Components Sensors have been split into categories. Then switch it on and see what value the CT clamp sensor reports. 330-ohm resistor is connected in series with the 2.5 volts led. With decent signal conditioning, and staying within the designed operating range of the CT, they are both precise and accurate. Just to be clear: these cheap CT sensors measure power as accurate as your thumb measures distance. The Expandable 6 Channel ESP32 Energy Meter Add-on Board can measure the amount of current being used by 6 circuits at a time! I assume yours does as well. Defaults to 32V (the max). I am currently trying to get a CT Clamp (SCT013-030) with a Wemos D1 Mini to work. All options from If you want to contribute, please read the Defaults to 3.2A. Which makes a great addition to your workshop by allowing you to monitor voltage, current, power and energy used over time on almost any DC device. Grounds on different devices can be at slightly different levels which if not all grounded together will mess up your calculations. (datasheet, Is it possible to replace 200kohm with 650kohm (I have one at home) multiples I will probably have to calculate from the measured first value? Hi, Joe! If all you want is that, great. Its VCC pin connects to the 5 V pin of the Arduino, GND pin to GND and the OUT pin connects to the A0 pin. Or on the ESP8266 alternatively also VCC, see ESP8266 Measuring VCC. Defaults to 60s. In the video after the break, [Xavier] goes over the theory of how it all works, but the short version is that you just need to use a Current Transformer (CT) sensor. runs on UPS 12V. Fortunately, thats easily repairable by reading any introductory material on the subject, or even just sitting and thinking for a moment or two. Hi Analog To Digital Sensor ESPHome Components Sensor Component Analog To Digital Sensor Analog To Digital Sensor The Analog To Digital ( adc) Sensor allows you to use the built-in ADC in your device to measure a voltage on certain pins. sensor (Required, ID): The source sensor to measure voltage values from. It is possible to get the old uncalibrated measurements with a filter multiplier: Note we dont recommend this method as it will change between chips, and newer ESP32 modules have different ranges (i.e. The first step to reducing the energy consumption of your home is figuring out how much you actually use in the first place. He even used Ionic to develop a cross-platform mobile application so he can fawn over his professional looking charts and graphs on the go. Without solar charging the battery will last a few months before voltage drops and discharge protection turns output voltage off. (the the alt-energy and RV folk are even worse, saying non-sensicals like amps per day routinely). Using both at the same time will result in incorrect sensor values. The other big Q is weather your average home owner is looking for accuracy or just ferreting out the big loads. example. bus_voltage (Optional): Use the bus voltage (voltage of the high side contact) value of the sensor in V. Learning how to put an ESPHome node to sleep to save power was one of many steps I had to retrace, but I'm finally ready to pick up where I left off with an INA219 DC voltage and current sensor breakout board. All options from In his case, he used a YHDC SCT-013-030 sensor that can measure up to 30 amps and. [08:18:28][D][sensor:092]: adc_sensor: Sending state 0.52344 V with 2 decimals of accuracy With the speed of the ESP32 i can see the sine wav form on the voltage and current (for voltage Im using a transformer, for current Im using a CT). The readings are stored in a database, and [Xavier] uses GraphQL and Dygraphs to generate visualizations. current (Optional): Use the current value of the sensor in amperes. Please also see this guide Sensor. Defaults to 3.2A. with ESPHome. It is possible to monitor V and A on ESP. What you need is simply a real power meter (like a $10 pzem004t v3 for example). ESP8266: Only pin A0 (GPIO17) can be used. The white wire connects to the - pad at the back of the metal strip in contact with the back or - terminal. update_interval (Optional, Time): The interval to check the sensor. kelvinA wrote a comment on Feedback - Hackaday.io. current (Optional): Use the current value of the sensor in amperes. [08:19:01][D][ct_clamp:051]: My Current Sensor - Raw Value: 0.00A Looking at the wiring picture, It seems you have 3 phases. Ive side-stepped the problem of actually sensing the line voltage by assuming that it is a perfect 230V sine wave, and detecting the phase with a zero-crossing detector (conveniently, it was already present in the design). My solar panel connects to the usb port on the battery shield. You will need to set the address of each device manually. two 470uf capacitors are connected at the input and output of the voltage regulator. Hi Joe, what external ADC you use ? If you plan to map all of your consumption, youll have to use clamps for the gray and black wire as well. But you do still have the red wire connected to 3v to run the wemos. I add the above lines to my esphome code. This board has a internal voltage divider and the battery voltage can easily be measured like this using 11dB attenuation the same UART bus. Nice and simple. 41.0mm x 32.1mm x 20mm (if Wemos D1 fitted). I have the same issue and yes, it has something to do with the POWER FACTOR. Im not sure connecting through the 3 v will be enough to power it and anything else you like a sensor Aug 25, 2021 ESPHome (previously known as esphomelib) is a Nabu Casa-owned tool with which you can create custom firmware for readily available and cheap ESP8266 and ESP32 boards. Im on the North American grid, so I used two CTs to read both buses. @ogiewon update_interval (Optional, Time): The interval to check the Here is an example wiring diagram I found for a similar SCT013-020 CT. You can see that your R1 resistor is included inside the CT packaging. I just measured it with a multimeter on DC between A0 and GND. max_voltage (Optional, float): The maximum bus voltage you are expecting. It seems there is a lot of potential error in the way he deals with the analog. this is a dual battery but from the same brand. Looking for a sensor that outputs its values as an analog voltage? lipstick you apply after doesnt change that, no matter how competent you are with those parts. This ESPHome configuration builds firmware for a DIY indoor air quality monitor. Maybe throw some machine learning at the problem of load differentiation. RP2040: GPIO26 through GPIO29 can be used. I have been using the CT Clamp for over a year and I recently found that when my load is OFF (no current) I get nan - I think this did not happen in the past but not sure: Sorry to ask this 12 months later - but why not use the 5V? the 50A version here: aliexpress.com 10.95US $ 32% OFF|Peacefair Newest Pzem-017 Dc 0-300v Volt Ammeter Rs485. For energy tracking I thought I might be able to get power and feed that into the Integration - Riemann sum integral. code Cute method of getting a quick & dirty phase difference measure. I went for the YHDC SCT-013-030 which can measure up to 30 amps of current (almost 7000 watts). eBay) sensors with This can be useful in situations ESPHome. Is it for additional voltage from the CT? required to be set up in your configuration for this sensor to work. Matthias Koch has added davidefa as a contributor to Greenhouse Blinky. The update_interval for ct_clamp has to be greater than sample_duration. [08:18:58][D][adc:056]: adc_sensor: Got voltage=0.52V After your hint with the frequency I put a small test program on the esp: With that i get the following readings (with a 60 Watt light bulb which should be around 260mA): (Comment Policy). R2 is connected to 3.3V. The IC Bus is The supported models are: PZEM-003, PZEM-014, PZEM-016 and PZEM-017. Custom firmware on its own might sound complicated, but ESPHome makes its creation easy. More than sufficient for my small apartment. Please be kind and respectful to help make the comments section excellent. Hey everyone, attenuation (Optional): Only on ESP32. Sensor. The supported models are: PZEM-003, PZEM-014, PZEM-016 and PZEM-017. I think thats ok to charge from. ESP8266 Mains Current Sensor - Wemos - Current transformer - SCT013 - 100A/50mA. It uses an STM32 for ADC measurements and ESP8266 for networking, and it measures voltage simultaneously with current, and therefore I can derive real power and power factor for each of the channels. Please feel free to add them to the It should average to 1.643VDC, with a 50-60HZ AC signal on top of it. required to be set up in your configuration for this sensor to work. Sometimes in the factory the + and - are reversed. Luckily, as [Xavier Decuyper] explains, you can build a very robust DIY energy monitoring system without having to modify your AC wiring. The IC Bus is All options from Sensor. For example, on the ESP8266, you can measure the value of an analog pin (A0 on ESP8266) or VCC (see above) but NOT both simultaneously. However start generating AC voltages bigger than 0.8V and the positive value will clip, giving erroneous results. calibrate_linear sensor filter. As. Updated Wiring The ADC in the ESP32 has a range of 0 to 1.1v. CAn you or anyone else reading this point me to some HAN devices suitable for a software type like me to be able to read and analyze locally? ESPHome will use this to configure the sensor optimally. I had been using an ESP32 with its integrated ADC to monitor the DC voltage output of my MPS500 battery. [08:18:23][D][sensor:092]: adc_sensor: Sending state 0.52344 V with 2 decimals of accuracy configure the sensor optimally. Good point! power (Optional): Use the power value of the sensor in watts. Arduino Code. After wiring up the following circuit: I am at the same point as with the esp8266: The ADC sensor always reports 1.10V and the ct clamp sensor 0.00005 A. ESPHome will use this to configure the sensor optimally. configure the sensor optimally. If you use the 5V rail it will be biased to 5/2 = 2.5V, allowing a 2.5V negative swing but only 3.3 - 2.5 = 0.8V positive swing. Note: If youre using a SCT013 CT that does not output a voltage, but rather outputs a current, you will need the R1 burden resistor shown in your circuit. [08:18:23][D][adc:056]: adc_sensor: Got voltage=0.52V I am using my ESPHome + wemos d1 mini. This means that >24 hours is a luxury. EDIT: I got it working using this suggestion: As im currently also reading into this - maybe of interest, even if it will not fix the issue: While working on JMPM, I ran into the exact same problem described by everyone else who has built a current sensor around the SCT013. lambda: return 240 * id(current_sensor).state; just does not seem to be multiplying the current x 240 with current steady as just over 2A I get a number of around 127 - not 480? Maybe even resistive load like a heating element that has a power factor of (apparent power = active power in that case ). The other important part is the CT sensor (Current Transformer). They are what the utility uses. The Yhdc current transformer is manufactured by Beijing YaoHuadechang Electronic Co., Ltd and is widely available from many stockists as Non-invasive AC current sensor (100A max), Model SCT-013-000. INA3221 3-Channel DC Current Sensor With load: [08:18:43][D][adc:056]: adc_sensor: Got voltage=0.52V Even a lowly Arduino Uno is more than capable of capturing two channels at more than a kilohertz: enough to capture 17 harmonics, like a real grown-up power meter does. To test if the sensor is working, upload the AnalogReadSerial sketch (File > Examples > Basics) to your Arduino. Thank you, that looks like it would work if I can figure out how to turn amps to watts, all new to this. can I connect directly to pin A0 3.2V or do I need to install a resistor? Step 1: Gather Components You will need: 1 x Arduino Current sensing electronics 1 x CT sensor YHDC SCT-013-000 1 x Burden resistor 18 Ohms if supply voltage is 3.3V, or 33 Ohms if supply voltage is 5V 2 x 10k Ohm resistors (or any equal value resistor pair up to 470k Ohm) 1 x 10uF capacitor Other A breadboard and some single core wire. CT sensors arent really that accurate, but you still get a useful indication. Users with a manually calibrated setup are encouraged to check their installations to ensure proper output. Of course, if you could train it by real power at load vs real whole house power for an extended period of time, itd probably get pretty good. However, the ESP requires a bit more soldering. First, hook up a known You charge battery from the usb port but not the 3x 5v small holes. max_current (Optional, float): The maximum current you are expecting. [08:18:43][D][sensor:092]: adc_sensor: Sending state 0.52051 V with 2 decimals of accuracy [08:18:11][D][ct_clamp:051]: My Current Sensor - Raw Value: 0.00A Yes even a MODBUS meter. Water and gas consumption measurement cannot determine when the magnetic sensor ignites. These are very cheap. ADC Sensor together with a formula like in the TEMT6000 It is available for Windows, macOS, and Ubuntu. ADC in your device to measure a voltage on certain pins. max_current ( Optional, float): The maximum current you are expecting. These little devices clamp over an AC wire and detect how much current is passing through it via induction. I can see that on your board just behind the usb port. 1 / 2. Theres more information at the manufacturers website. The inexpensive Chinese CTs have a shunt system consisting of two Zener diodes in place to prevent this situation from arising. Recompile and upload, now your CT clamp sensor is calibrated! The pzemdc sensor platform allows you to use various DC Peacefair PZEM energy monitors with ESPHome. For energy tracking I thought I might be able to get power and feed that into the Integration - Riemann sum integral. ESPHome will use this to configure the sensor optimally. You could just log the current consumption to a plain text file if thats your style, but [Xavier] wanted to challenge himself to develop a energy monitoring system that rivaled commercial offerings so he took the data and ran with it. The circuit described in the linked article is an excellent and woefully-common example of how NOT to implement it. I have set up a test with both 5V and 3.3V and both work. I dont think its limited to 120v Just scale R4 accordingly, isnt it ? In order to use the sensor with the ESP8266, you definitely need to take care of two things: You need a 5V power for the sensor (the ESP works on 3.3V), or you can use Vin pin if you powering board with USB. This looks to be nicely written up. My battery charges from a 6v solar panel so voltage goes up during day. Thanks for the detailed answer! ESPHome will use this to [08:18:08][D][sensor:092]: adc_sensor: Sending state 0.52344 V with 2 decimals of accuracy It not very good to run a sensor continuously by battery. Thats back of a napkin maths. ignore that). The INA219 seems to have pull up resistors, as I have around 3.3V on the SCL and SDA pins. A good chunk of his write-up explains how the used Amazon Web Services (AWS) to process and ultimately display all the data he collects with his ESP32 energy monitor. This is the job of expressing V DT in terms of the ADC value of the ATmega328P of Arduino UNO. It looks like when load is higher difference is going down and when load is going down - difference is going up. What modifications can be done in order to use two CTs? You must therefore have a uart: entry in your configuration with both the TX and RX pins set ESPHome INA219 DC Current Sensor Instructions for setting up INA219 DC current sensors ESPHome INA226 DC current and power sensor Instructions for setting up INA226 DC current and power sensors The pzemdc sensor platform allows you to use various DC Peacefair PZEM energy monitors with ESPHome. Take a look at this: https://www.crowdsupply.com/circuitsetup/split-single-phase-energy-meter/, IoTaWatt is an open source 14 channel ESP based true power energy monitor that I like. I just dont know when we would want to know the hourly rate of change of power Joules/Second/hour haha. shunt_resistance (Optional, float): The value of the shunt resistor on the board for current calculation. ), Nice link thanks. Defaults to 32V (the max). Some shields dont work at all. Im quite confident that you will not be able to calculate the real power just with a current meter. update_interval (Optional, Time): The interval to check the sensor. MAX6675 K-Type Thermocouple Temperature Sensor, A new version has been release since you last visited this page: 2023.3.0 , Different ESP32-ADC behavior since 2021.11. An energy meter is measuring with 20MS/s and up AND is measuring the voltage and can be bought from China for 20 bucks. [08:18:18][D][adc:056]: adc_sensor: Got voltage=0.52V The below code is how you can access the temperature and expose as a sensor. ZMCT103C is a 5A Range AC Current Transformer Sensor Module For Arduino. Improvements can be made by putting in a drop-in replacement for the 7805, such as the Murata and by adding a 50-60Hz Lowpass or Bandpass filter to suppress any noise in the measurements. Misunderstanding the units hardly implies misunderstanding anything else. It is a 12-bit ADC that is pretty inexpensive, and communicates with the ESP via SPI. [08:18:48][D][sensor:092]: adc_sensor: Sending state 0.52148 V with 2 decimals of accuracy The INA219 is a current and voltage sensor that you use with any Arduino, ESP8266 or ESP32 microcontroller. You may need a different multiplication factor. But fiddling around with high voltage is something a lot of hackers will go out of their way to avoid. The other end of this wire connects to the ground terminal on the wemos. We will be measuring the voltage and current in this project but in a unique way. I really like the method used here: https://www.mousa-simple-projects.com/2017/12/power-factor-measurment-using-arduino_18.html. Sensor. Im building a 12-channel power meter, using current transformers, in a DIN rail mountable enclosure. The ADC output reads voltage very accurately since 2021.11 where manufacturer calibration was incorporated. ESP8266: Only pin A0 (GPIO17) can be used. [08:18:18][D][sensor:092]: adc_sensor: Sending state 0.52344 V with 2 decimals of accuracy It is just around the live wire. 5. Learn how your comment data is processed. My idea is to collect the voltage and current at the same time. ESP8266 Energy Monitor Blog. I have an arduino sketch that uses some RMS libraries that gave me the right readings, but I really dont know how to move the code (and libraries) from arduino to Esphome Unfortunately it is the same as before. Are you willing to share any details of how you set this up? It looks like when load is higher difference is going down and when load is going down - difference is going up. All options from Thanks. Hello, could you provide wiring diagram and resistors/capacitors used to read positive and negative values? The ESP8266 only has one ADC and can only handle one sensor at a time. Do you know the number of windings in the clamps? Contribute to esphome/esphome-docs development by creating an account on GitHub. So to calculate the voltage you do (x/1024.0)*5.0 = x in volts. This sensor is not available on the GPIO pins, but is available on the internal ADC. Creating this circuit is very simple and uses generic components. The outputs for the shield is 3V or possibly 3.3v and 5v, which is regulated. The pzemdc sensor platform allows you to use various DC Peacefair PZEM energy monitors LKent (Kent Loving) March 29, 2020, 12:53am #1. With my clamp meter I can measure the 0.240A. CT sensors can be very accurate if the system is calibrated properly. Id love to be less reliant on the Raspberry Pi (and its potential for corrupted SD cards, etc.) [08:18:31][D][sensor:092]: My Current Sensor: Sending state 0.00015 A with 2 decimals of accuracy. The change is rather high that when you use a higher power device that it has a better power factor. FastLED Light. And if you want some greater accuracy. contributing guide. The communication with this integration is done over a UART bus . ESPHome will use this to All options from Sensor. Random example: Maxims MAXQ3180. It is sad it is limited to 120V. bus_voltage (Optional): Use the bus voltage (voltage of the high side contact) value of the sensor in V. All options from Sensor. Battery meter will also use up some power especially if running continuously. get correct values: On the ESP32 the voltage measured with the ADC caps out at ~1.1V by default as the sensing range (attenuation of the ADC) is set to 0db by default. And the chance you are missing something is pretty high. All options from The filter values are taken from the RP2040 datasheet to calculate Voltage to Celcius. [08:18:28][D][adc:056]: adc_sensor: Got voltage=0.52V where you want to shut down the chip if the voltage is low when using a battery. These low-power plant tags are built around increasingly ubiquitous e-Paper displays, like the kind you might find in a retail shelf price tag system. It should usually be around 3.3V. And for those who may be more inclined to measure real power (as opposed to just measured current times the average line voltage), and arent afraid to connect some (optoisolated) components to the line directly, the Woodward power meter is a very clever and simple technique that uses a quad optoisolator as the sensor. tl Much like our Split Single Phase Energy Meter, the 6 channel energy me Will interface to any SPI compatible microcontroller (including of course ESP8266) and is supported via ESPHome. ADS1115) and pass it to the CT clamp sensor with the sensor option. All options from :ref:`Sensor <config-sensor>`. Now go into your configuration file. There is a large + on the board. The ESP8266 ESP-01S and the INA219 (it's datasheet) should talk over I2C. These can measure current 1mA to 100Amp and Voltage up to 100VDC, and it's very precise And yes it can also measure negative current And I also have added DHT11 So it can measure Temperature & Humidity It can also be integrated with your Home Assistant and you can see it wirelessly I'll mostly use this for capacity testing Lifepo4 Battery Well thank you. Thanks Mattias, that with the calculation of the water pressure in bar is correct. The Sense energy meter product does this. current load like a lamp that uses a known amount of current. Missed the bit about charging . Name: Electronics-Salon Panel Mount AC/DC Current Sensor Module Board, Based on ACS758 ( /-150Amp) Company: CZH-LABS Amazon Product Rating: 4.2 Fakespot Reviews Grade: A Adjusted Fakespot Rating: 4.2 Analysis Performed at: 10-16-2020 Link to Fakespot Analysis | Check out the Fakespot Chrome Extension! Defaults to false. De sensor werkt op 6 tot 36V DC. Have a look at post 24 here, your need you use return x. thank you so much, this is the sort of example I have been looking for! With this configuration the reading of the arduino analog port was left with a difference, that is, even with it calibrated and without any load on the SCT013 sesor, it gives a reading of practically 0.5A and is not zeroed. Operating environment/Installation (Hass.io/Docker/pip/etc. J. M. Hopkins has updated the log for Eurorack Mute Sequencer. The ina3221 sensor platform allows you to use your INA3221 3-Channel DC Current Sensor ( datasheet , switchdoc) sensors with ESPHome. max_current (Optional, float): The maximum current you are expecting. J. M. Hopkins has added details to Eurorack Mute Sequencer. Defaults to 200ms which would be 10 whole cycles on a 50Hz system. Every 30 seconds, the hardware reports the current consumption to AWS through MQTT. The ESP code an provide a max / min value (at the max voltage what was the current). 0-8191); it is better to use the new calibrated voltages and update any existing filters accordingly. Your current sensor will only deliver amperage, Powered by Discourse, best viewed with JavaScript enabled, Energy Tracking - CT Clamp Current Sensor. TBH I didnt think your setup completely through, but when I saw your 1.10V reading, this immediately reminded me of a similar problem I had getting correct values from that sensor: Im not sure why you are getting the 1.10V even when the light bulb is off, but you should keep in mind, that you may just always see the maximum voltage an ESP32 ADC sensor returns with the attenuation set to default. (why shouldnt a charger be connected?). It looks to me that that circuit cant distinguish between leading and lagging power factor. Have a look at the Yes VCC is misleading here. If you are using Watts per hour it in the place of Watts or Watt-hours per hour, then you are ignorant and have a fundamental misunderstanding of how electricity and the universe in general works: You are instantly identified as incompetent. I assumed @audacity363 probably knew that already, but better safe than sorry! Thanks for the explanation. The Current Transformer Clamp (ct_clamp) sensor allows you to hook up a CT Clamp to an analog This sensor clamps over the main cable in your house and transforms the magnetic field around the cable into a voltage. The :ref:`IC Bus <i2c>` is required to be set up in your configuration for this sensor to work. You also need an amplifier with excellent common mode rejection and/or good electrostatic shielding. All options from A new version has been release since you last visited this page: 2023.3.0 . The Analog To Digital (adc) Sensor allows you to use the built-in Powered by Discourse, best viewed with JavaScript enabled, CT Clamp sensor interference on ESP32 ADC, No sensor readings from SCT-013-030 @ ESP32 NodeMCU with ESPHome, Cannot get CT Clamp Current Sensor to work, Low current measurement performance of the SCT013 - Casler. I am trying to multiply the current by 240 (Vac) but the answer I get isnt right, I mean in HA I can see a current of say 2.2 A but the power is around 127 Watts. [08:18:21][D][ct_clamp:051]: My Current Sensor - Raw Value: 0.00A A new version has been release since you last visited this page: 2023.3.0 . Can it be enough to know the rms voltage and the current at the same time without taking the power factor into account to be able to distinguish between active (kW) and reactive (kVAR) power? J. M. Hopkins has updated the project titled Eurorack Mute Sequencer. Before this every ESP32 would read different voltages and be largely inaccurate/nonlinear. Demos d1 I think with just wifi running is about 70mA and probably bit higher if use battery shield. It monitors: CO concentration; PM2.5 and PM10 concentration; temperature, humidity and pressure; It optionally shows feedback for the current air quality with an RGB LED: green if the air quality is good, yellow if it's acceptable, and red if it's bad. R2 and R3 and being used to level shift the the output of the CT (RED) by +1.65V, as the output of the CT will vary from -1V to +1V. This is the other side. I loaded a minimal ESPHome configuration, using the example in the ESPHome doc for the INA219. It certainly doesnt put people on the moon.

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