danielcodex/fieldmill-firmware

Firmware for our field mill project

FieldMill-Firmware

Firmware for our FieldMill project

To install it (Visual studio Code with PlatformIO and the Espressif IDF are required)

1. Clone or downlaod and extract this repo.
2. Open the project
3. Use the "esp32dev -> Platform -> Build Filesystem Image" and "esp32dev -> Platform -> Upload Filesystem Image" to write the website code to the ESP
4. Upload the firmware using the "esp32dev -> General -> Upload" option

How to use it

First steps

The ESP32 will open an unsecured network called Field Mill for configuration. Connect to it and go to 192.168.4.1 , which will show the current sensor reading.

Setup

To change settings like wifi and mqtt go to "Setup -> Settings". If you change the wifi settings the mill will reboot for them to take effect, if it fails to connect it will re-open its own network.

Calibration

The mill comes with a default calibration that I created with my calibration setup. If you want the readings to be super accurate you'll need to calibrate it again yourself, which you can only do if you can create a known reference field. For this you must be connected to a wifi network that has internet access and go to "Setup -> Calibration".

Hit the Clear button underneath the graph to remove all exsisting calibration points and start from scratch.

Apply a field and write the strength you applied into the Applied field spinner and click "add" (make sure to wait 5-10sec for the value to settle!). Do this for as many points as you want to, I did 5 positive and 5 negative plus a zero.

Hit save to store the calibration to the ESP (THE NEW CALIBRATION WILL BE LOST IF YOU DON'T DO THIS)