cleanup of documentation and image data
This commit is contained in:
Sebastian Wendel
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# Hardware
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We are using HelTec Automation Wirelsess Sticks ESP32 Dev-Boards.
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## PinOut
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The PinOut of our version 3 modules can be found here: https://docs.heltec.org/en/node/esp32/dev-board/hardware_update_log.html#wifi-lora-32-hardware-update-logs
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## License
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For some parts of the Heltec board you need a ["license"](https://docs.heltec.org/general/view_limited_technical_data.html#esp32-lora-series).
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## USB-C
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Our HelTec Automation Wirelsess Sticks ESP32 Dev-Boards already have USB-C. But they do not support Power Deliver (PD). If your computer tries to do PD, just plug a cheap USB hub between the board and your computer.
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## Arduino IDE
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HelTecs GitHub repo can be found here: https://github.com/HelTecAutomation/Heltec_ESP32
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I had to install VCP Drivers, first: https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers?tab=downloads
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You can add their Board Manager to the boards managers URLs: https://github.com/HelTecAutomation/Heltec_ESP32/blob/master/library.json and find their libraries in the IDE (Sketch -> Include Library -> Manage Libraries... Search for "heltec esp32").
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> These boards are already _V3_ boards, so be careful selecting the right board and port (VCP).
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## Install esptool
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Esptool is a Pyhton program to flash ESP32. As it's a Pyhton tool you can install it using `pip`:
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```sh
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pip install esptool
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```
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## Find the port
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Usually you can find the used port using `esptool.py`:
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```sh
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esptool.py write_flash_status --non-volatile 0
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```
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### Using MicroPython
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Download the firmware: https://micropython.org/download/
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Flash it using `esptool`: https://micropython.org/download/GENERIC_S3/
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```sh
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esptool.py --chip esp32s3 write_flash -z 0 ~/Desktop/GENERIC_S3-20220117-v1.18.bin
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```
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@ -1,6 +1,6 @@
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# Energy Monitor
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Our energy monitor is based on the openenergymonitor.org project (Licence GNU GPL V3).
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Our energy monitor is based on the [openenergymonitor.org](https://openenergymonitor.org/) project (Licence GNU GPL V3).
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It uses our HelTec Wireless Stick. This - of course - can be replaced by a cheaper ESP32 module.
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@ -14,6 +14,10 @@ Power Measurement is done by a SCT013 clamp (100A:50mA).
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### PinOut
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We are using HelTec Automation Wirelsess Sticks ESP32 Dev-Boards.
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The PinOut of our version 3 modules can be found here: https://docs.heltec.org/en/node/esp32/dev-board/hardware_update_log.html#wifi-lora-32-hardware-update-logs
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We use A1, A2 and A3 because they are free (most ADCs are already used on the HelTec Board)
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@ -59,8 +63,24 @@ R3 is the burden resistor. Ideal burden would be 19 Ω. As this is not a common
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See the Fritzing file for [details](./energy-monitor.fzz).
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## USB-C
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Our HelTec Automation Wirelsess Sticks ESP32 Dev-Boards already have USB-C. But they do not support Power Deliver (PD). If your computer tries to do PD, just plug a cheap USB hub between the board and your computer.
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## Code
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### Arduino IDE
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HelTecs GitHub repo can be found here: https://github.com/HelTecAutomation/Heltec_ESP32
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I had to install VCP Drivers, first: https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers?tab=downloads
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You can add their Board Manager to the boards managers URLs: https://github.com/HelTecAutomation/Heltec_ESP32/blob/master/library.json and find their libraries in the IDE (Sketch -> Include Library -> Manage Libraries... Search for "heltec esp32").
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> These boards are already _V3_ boards, so be careful selecting the right board and port (VCP).
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### Print to serial out
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Start with a simple code that just prints the values. The code is quite simple, as we can use the existing _[EmonLib libary V1.1.0 by OpenEnergyMonitor](https://docs.openenergymonitor.org/electricity-monitoring/ct-sensors/)_.
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@ -109,6 +129,10 @@ The `mqtt_server` in tis example posts to my local IP adress. The Wifi network i
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The `mqtt_prefix` should be different per device, as this is the topic prefix used to identify the device.
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We now can consume this messages in Node-RED, store them in InfluxDB and build a dashboard in Grafana.
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If you haven't deployed the [IoT prototyping backend yet, check out our guide](https://code.curious.bio/curious.bio/iot-backend/).
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### Testing
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You can subscribe to your local MQTT server and subscribe to all or just the interesting topics:
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Binary file not shown.
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@ -70,52 +70,7 @@ It will post MQTT messages unter a topic `tele/tasmota_891E97/SENSOR` like this
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We now can consume this messages in Node-RED, store them in InfluxDB and build a dashboard in Grafana.
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### InfluxDB Bucket
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I created a bucket called `shelly`in InfluxDB, so we can store the messages in this bucket.
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### Node-RED
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I create a usual flow in Node-RED. A MQTT node fetches the values.
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The message is fed into a filter function to only store usefull information:
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```ini
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return {
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payload: {
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power: Number(msg.payload.ENERGY.Power),
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voltage: Number(msg.payload.ENERGY.Voltage),
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current: Number(msg.payload.ENERGY.Current)
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}
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};
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```
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The `payload` will be stored in InfluxDB in the bucket "shelly".
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### InfluxDB Data Explorer
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In Influx DB Data Explorer you can query the stored data.
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The query created by Data Explorer looks like that:
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```flux
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from(bucket: "shelly")
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|> range(start: v.timeRangeStart, stop: v.timeRangeStop)
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|> filter(fn: (r) => r["_measurement"] == "msg")
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|> filter(fn: (r) => r["_field"] == "power" or r["_field"] == "voltage" or r["_field"] == "current")
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|> aggregateWindow(every: v.windowPeriod, fn: mean, createEmpty: false)
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|> yield(name: "mean")
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```
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### Grafana
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Using this query you can crate a dashboard in Grafana.
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If you haven't deployed the [IoT prototyping backend yet, check out our guide](https://code.curious.bio/curious.bio/iot-backend/).
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## Links
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# Bill of Materials (BOM)
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| Part | Quantity | Note | Link |
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| --------------------------- | -------: | ------------- | ------------------------------------------ |
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| ESP Microcontroller | 1 | | |
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| SCT-013-100 | 3 | one per phase | http://openenergymonitor.org/emon/node/156 |
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| 10 kOhm Resistors 1/4 W | 6 | two per phase | |
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| 22 Ohm Resistor 1/4 W | 3 | | |
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| 10 uF Elko 10 V | 3 | | |
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| 3,5 mm audio jack connector | 3 | | |
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| Part | Quantity | Note | Link |
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| --------------------------- | -------: | ---------------- | ------------------------------------------ |
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| ESP Microcontroller | 1 | ESP8266 or ESP32 | |
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| SCT-013-100 | 1 | one per phase | http://openenergymonitor.org/emon/node/156 |
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| 10 kOhm Resistors 1/4 W | 2 | two per phase | |
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| 22 Ohm Resistor 1/4 W | 1 | one per phase | |
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| 10 uF Elko 10 V | 1 | one per phase | |
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| 3,5 mm audio jack connector | 1 | one per phase | |
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