ESP-IDF ESP32-C3 plant moisture monitoring
This code monitors 3 ADC sensors on a ESP32-C3 and sends their values to InfluxDB.
What it does
- Connect to WiFi (configurations under Kconfig)
- Synchronize time with NTP (local NTP server highly recommended!)
- Get a URL that contains the station config (MAC to station name mapping) (protip: you can host this on Home Assistant)
- Read the ADC sensors
- Write the values into InfluxDB 1.8+ (using InfluxDB v2 API) (protip: you can also install this into Home Assistant)
Configuring
If you have Home Assistant, you can create a /www directory under the configuration directory.
Files there will be available under your Home Assistant URL with /local/ path. Eg. I created
a file called plants.txt under the www/ directory with the following contents:
64:e8:33:00:7a:54 living_room
d4:f9:8d:03:75:00 bed_room
Then the ESP_CONFIG_URL I have set http://homeassistant.localdomain/local/plants.txt.
To get the MAC addresses, flash the firmware according to instructions below and look for this in the serial output:
I (6452) plantmonitoring: WiFi MAC address: d4:f9:8d:03:75:00
Building
Install ESP-IDF 5.0+.
idf.py menuconfig
idf.py buildTo flash, press the B button on the ESP32C3 and connect USB-C cable, then run (replace COM5 with the COM port you have connected the ESP32 to):
idf.py -p COM5 flashThen reconnect the USB cable and monitor the serial:
idf.py -p COM5 monitor