The second option also means you

2021/05/21

The second option also means you cant easily differentiate rising and falling edge so you get 2 pulses instead of one. By default they use j-link adapter for upload so I needed to adopt them to use st-link by setting in platformio.ini: At that time it also required some changes to PIO but now it works out of the box. But i still got no data from this. Grandeur handles device communications with Cloud over the web, which means we first need to connect our ESP to internet which is what ESP8266WiFi library is for. This hooked me up to the idea of setting up user accounts. on any pin. But i have problems which photo resistor to use? The power meter shows the current and power consumption graphs in the web app on my phone. Then I tried to directly connect 3.3V voltage (behind regulator) and checked the current: 28uA was very nice result so I had to find the problem. I use this ESP32 device: https://www.amazon.de/gp/product/B071P98VTG/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 There are a few parameters that need to be tuned for each power meter's pulses/KWh (usually says XXX imp/KWh somewhere on your meter). Green LED: the green LED is attached to GPIO0 of the ESP8266 and pulses if the ESP8266 has detected a good pulse. // No pulse count value received from controller. Disassembled sensor can be seen on this page. Have a look at the tasmota firmware. On logging in, I see my PM-1 power meter that I registered earlier from the Cloud Dashboard. You can find my design on thingiverse. "Received last pulse count value from gw:". And you can use a magent to mount a IR-LED. No way. I'm designing my power meter from the same commercial and production point of view as Moiz did: a company producing power meters and selling it to real users. The data is received by:- Openhab2- Node-red via which the data is uploaded to Thingspeak, - 3DU5C Phototransistor (see video for explanation). Therefore I used the LED pulses to read the current Power, the LED pulses 1000 times for 1 kW/h.

In my current flat the central heating runs on natural gas and I wanted to have a nice chart showing its consumption. Simplifying IoT dev; abridging that huge gap between our softwares and hardwares. So I no longer have to rely on the same Blynk app for every product I make I can make separate standalone apps for each. API key acts as the identifier for my project while access credentials (Access key and token) are part of the request's source validating scheme. Ive had digital meter installed in my fuse box so it was only matter of preparing another board, disabling debounce (because it has nice sharp edges on pulse output) and connecting it: This allows me to debug and optimize my home actual power consumption.Now I am very interested how long will these two meters last on battery. Counting switch presses is easy, going into sleep was new to me but I managed to make it work. I suggest to change the minimal pulse length (PULSE_MIN_LENGTH in line 18 of my code) to 5 ms.

Defaults to DISABLE. The principle of operation is simple: Normally it is in sleep. Along with this, a user would be able to pair a device and monitor the current and power readings in realtime after he/she logs into the app. It also has the pairing feature that I need. I used ESP8266 and at that time EasyESP but I already converted it to ESPHome. and created a new project for my IoT product: I created a model for my new IoT product aka. Surely one of is the mentioned GPIO PIN12 as mentiones in the code. In this mode the sensor will sleep most of the time and only report KWh. I have done a bit of research on this. This not only makes it more complex than it needs to be but also compromises other users' privacy. It sends the output data to my MQTT broker. repeater and gateway builds a routing tables in EEPROM which keeps track of the Only a short hint: You have a "Smart Meter". // Minimum time between send (in milliseconds). There are two outputs on the electricity meter you have on the picture. To see his devices and their data, he/she would have to log in just like you do on facebook (you see your friends, your own posts, and your own groups, not everyone else's). One of DISABLE, INCREMENT and DECREMENT. However, to ensure a clear '0' and '1' I choose to add a LM293 comparator. You can find the documentation here Here's the "hello world" tutorial to give you the most beginner context. In this Instructable you find out how I read my Main Electricity Power use of my house and publish it via an ESP8266, Wifi, MQTT in my Openhab Home Automation.

Tune the sensitivity/trigger level by adjusting the trim potentiometer on the sensor board. While controlling an appliance from phone is cool, it doesn't save you any money, right! To use correct pin mapping with Arduino, I also had to set board to: Then I could develop some code but I stuck on configuring sleep mode and there is also very limited support for nrf51 in Arduino so I moved to Mbed. Built is like described on the ESPHome page (link). The counter value is kept in RAM only to avoid flash wear. Read the values in Openhab to get these cool graphs! Ill post an update after some time, Im lazy to make a proper extrapolation . My meter was showing 11mA at 4.5V which was way too high for battery powering. My first choice for making IoT device was esp8266 module, specifically NodeMCU Amica which I had at hand. Another important consideration is the fact that ACS712 should only be used for subsystem monitoring and it is highly, to use it for power monitoring of entire home. Power optimizations came to play then. If there is a pulse (light), the output from the phototransistor circuit is higher (ca. What photo resistor to use for the power meter? detected. About: I like to combine electronics like Arduino's, ESP8266 etc with 3D designing and 3D printing. When I measured voltage on the reed switch it looked like this:When the magnetic force switches the switch there is a short period of bouncing which could cause false pulse detection. While those tools are good for prototyping a hardware project, they do not solve issues of commercializing an IoT product. After a month in production I can share some data with you. API key acts as the identifier for my project while access credentials (Access key and token) are part of the request's source validating scheme. Awesome! power, and the time of the update, and updates the old summary on the Cloud with the new one. When a user logs into the app, he/she sees empty list, and an "Add a device" button, on clicking which he could enter the device ID (which I would print on the device itself), and that device would be added to his/her devices list. id (Optional, ID): Manually specify the ID used for code generation. In every loop, it runs the sendUpdate function which reads current sensor's OUT pin (connected to ESP's A0) for one second, translates from ADC levels to voltage, gets upper and lower voltage peaks from that one second data, calculates peak-to-peak voltage, then RMS voltage, translates it to RMS current, and then finally calculates power. Use a smartphone and make a visio to see, if the right one is sending every second. If you plan to use a TSL250R instead of an LM393, refer to the data sheet below for the pin connections. When it receives interrupt on pin with reed switch, it increases counter value and ignores subsequent pulses for certain time. Grandeur naturally rejects all requests coming from unknown origins for security, therefore we need to add localhost:3000 to project's allowed origins list. This. You can see the code here. We don't want to spam the gateway. Since I have real users, there are some issues here. This hooked me up to the. But I found their hackster channel to be the most helpful for they feature real projects there. Each customer would have to register his/her account on the web app when he/she buys a device from me for the very first time. My Power meter is unsmart today. On the ESP32, Let's see how I integrated Grandeur and built the app. I already have flashed it and this is working, even it appears in my WLAN. One for receiving and one for sending. The measuring device has to be small, look professional and have low power consumption so it can run on batteries. With the comparator, I used a 300K resistor. The expansion board was used only for developing, its not inside the final product. There is unused TV inlet (RG-6 coaxial cable) nearby to the meter that is wired to the rest of the apartment, can I send 12V or 5V DC current with the coaxial cable from within the apartment to the ESP by soldering the 2 conductors of the coaxial cable for less than 10 meters? Aliexpress search showed one very cheap and compact BLE module so I gave it a try. I know. They are marked as 20 and 21. You can find the. so it is perfectly optimized for low power consumption. of pulses/min. Some basic hookup info Here and I think you would use a Binary Sensor component to read the blinks. The pulses are detected by an ESP8266. In the App SDK, there's this Auth API which lets you perform user authentication in the app. Defaults to 13us. What do you mean by pin 20 and 21? Im using Tasmota built in Counter functionality. total (Optional): Report the total number of pulses. I had some disturbation with exterior light and therefor do a check on the pulse length. What I did was doing ADC on the output of current sensor (which is the voltage induced due to the current) and measured the actual current by multiplying it with the sensitivity of the current sensor (1A change in current changes the induced voltage by 185mV for a 30A current sensor). This is the very first prototype of my power meter. Thanks for the comment. However i did not follow through to the end because I went a different route (my meter sends radio signals I went with This ). Now let's move to the second issue. Thanks for the tip. When a user logs in, how will the app know which devices (from the devices that I sold) does this particular user own? You can change this by using Sensor Filters. The gas meter is directly in the hallway so everyone can see it. Hello, very interesting post. for pushing current and power updates to my project on Grandeur. Was the same circuit design used for both gas and electricity meters? The real one was following: 4.17mA when transmitting and 3.1A in sleep so the power budget looks like this: When we take into account typical AAA battery capacity of about 540mAh it should theoretically last more than 3 years which is way better than I required (at least a year). https://github.com/Wim3d/Main_power_meter, Arduino Robotic Arm Controlled by Touch Interface, https://www.mysensors.org/build/pulse_power, https://forum.creationx.de/forum/index.php?thread/1095-d0-z%C3%A4hler-sml-auslesen-mit-tasmota/. In next lines Ill describe how I have achieved this. On logging in, I see my PM-1 power meter that I registered earlier from the Cloud Dashboard. count the light pulses on a power meter, you can do the following: When the total sensor is configured, the pulse_counter also reports the total Inspired by wireless thermometers I started to experiment with 433MHz transmitters and receivers. Monitor power consumption of your appliances in $4. and is only meant for delivering a proof of concept since the focus of this project is more around the software segment. Well done. It might be of help to you. Sorry for the brief description, like I mentioned I did not follow through with this solution. What that means is I can develop my own power meter (on device-end) and my own app (on user-end) and just connect them together with Grandeur as their integrator. 1.5V) therefore Vref ? This filters outliers. However, due to the use of the pulse counter peripheral, a maximum of 8 channels can be used! count_mode (Optional): Configure how the counter should behave But I found their. After some transfer tests I was not satisfied with the reception quality (see my RX test) and I also wanted to avoid interference and link level problems and their debugging so I moved to a higher level solution. With. the power meter from the. I did some tests and measurements and it takes hundreds of milliseconds to wakeup from sleep and to count the pulse and several seconds to connect and send the result via WiFi. Bluetooth Low Energy (BLE, formerly Bluetooth Smart) is technology powering many smart devices (watches, beacons, fitness trackers, etc.) This means I can build register/login functionalities. However, you need a good and clear '0' and '1'. /* So in this tutorial, I'll show you how I built my IoT power meter that monitors current and power of appliances similar to the cooler. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. 03. Thanks a lot for pointing at these errors. If you are reading these lines Im glad my post interested and maybe inspired you. Since I have real users, there are some issues here. i would like to built the power meter, described here: https://esphome.io/cookbook/power_meter.html. Here is every step that I did to make use Grandeur to build my app: To build up program for ESP8266 on Arduino IDE, I used Grandeur's Arduino SDK for pushing current and power updates to my project on Grandeur. The first surprise was that the pin pitch was not standard 2.54mm but 2mm. I am thinking of the same (gas counter) to send data into domoticz. Of course will need to drop to 3.3V at the ESP. I soldered a button switch between RST and GND forn an easy reset and a slide switch between GPIO0 and GND to boot in in flash mode.

On this picture you can see everything whats used in production: https://blog.danman.eu/wp-content/uploads/2018/04/IMG_20180316_155349_HDR.jpg, Data format is simple json: https://github.com/danielkucera/ble-meter-mbed/blob/master/src/main.cpp#L114. You can check what they are offering at their, and each SDK has its own details documentation. Your email address will not be published. Learn how your comment data is processed. Timestamping each summary packet with the time of the update helps me plot the current and power on a timeseries graph in my web app. Feels neat! For example, if youre using the pulse counter with a photodiode to That is exactly why I used a phototransistor. I have a 'smart meter' ISKRA Type MT372, however it has no easy possiblility to export the data. While controlling an appliance from phone is cool, it doesn't save you any money, right! Defaults to INCREMENT. If your meter has a visible to the naked eye blinking light then any Photoresistor well work. I found out, one can buy original sensor attachable to my type of gas meter. Here's how I did its registration. I found out, that the USB-to-serial chip is powered from Vin so I tried to scrape it off: After this, the current dropped to 3mA but this was still too high. There needs to be a mechanism that shows a user only his/her devices when he/she opens the web app. Ill post an update after batteries die. I checked some reviews on the Internet and found out that Wemos D1 mini boards should have better power regulator so I ordered one. To see his devices and their data, he/she would have to log in just like you do on facebook (you see your friends, your own posts, and your own groups, not everyone else's).

Costs me (here in germany) about 15 EUR. See this image: https://ae01.alicdn.com/kf/HTB1ZIbibL1H3KVjSZFHq6zKppXao/DDS518L-120-230.jpg.

When I click on it, I see it's current and power graphs getting plotted on data coming from my power meter in real-time. And there's the Device API, which lets you send/fetch data to/from the hardware device. Grandeur naturally rejects all requests coming from unknown origins for security, therefore we need to add, to project's allowed origins list. First step was to discover how does the measurement work. Something like that.

predefines the variables that the IoT product would have and which will later be fetched/updated from the device-end or the app-end. I tried to use a photoresistor to make a tachometer but it's too slow to handle that job. May someone please give me a hint which one and how to connect which cable to which GPIO PIN? How is battery life affected?

to be the most helpful for they feature real projects there. project by Moiz where he switched the cooler on/off from his web app and I thought of extending it a little. So, the hardware worked. This is much better.

But the Arduino SDK requires my project's API Key and my device's ID to know which device in which project are we referring to when setting summary. Grandeur is a rather new but very mature tool to build IoT products if you are aiming to commercialize. See the pictures and the scheme for explanation.

In the mean time I got a newer power meter, so I can not review this point. What is the circuit for the smart electricity meter? on terminal opens up my power meter web app in my browser. You can check my project HERE - there are links to purchased components 12. Grandeur is a rather new but very mature tool to build IoT products if you are aiming to commercialize. Fortunately (and thanks to Mr. Stehliks lecture), Ive found a 3D printable sensor clip which only needs adding a reed switch for under 1EUR and you have a working sensor. for fetching summary updates from the Cloud, and then put up current and power graphs from that data using chart.js. Here's how I did this from Grandeur Dashboard Settings: Running grandeur serve on terminal opens up my power meter web app in my browser. Based on this Youtube video I choose a phototransistor.

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