> I don't use this, personally, but it strikes me as a fantastic idea. I made a sensor board and wrote my own firmware for it, maybe I'll see if I can easily configure ESPhome to run on it.
I've done pretty much the same, but last I looked there were very few resources (other than reading the code for the ESPHome project) to help on creating custom firmware for a new board with multiple sensors. It seemed easier and faster to simply write the firmware to talk to a simple backend.
I'm also curious about how they get the code for esp32 devices to fit: on a device with 4MB flash, you effectively have a 1MB program limit if you want OTA (which you do). A simple program that does nothing but make calls to the libraries for GPIO, ADC, UART, Wifi, https, https server, interrupts, FreeRTOS, mqtt, nvs, chip info, logging, OTA and functions in the standard library (scanf alone uses 30kb) already takes you over the 1MB limit.
Compiling with all the logging turned off can get you a roughly 800kb program, which is still close to the limits considering that doesn't include program logic.
I'll have to look at this again when I next require some remote monitoring thing.
I've done pretty much the same, but last I looked there were very few resources (other than reading the code for the ESPHome project) to help on creating custom firmware for a new board with multiple sensors. It seemed easier and faster to simply write the firmware to talk to a simple backend.
I'm also curious about how they get the code for esp32 devices to fit: on a device with 4MB flash, you effectively have a 1MB program limit if you want OTA (which you do). A simple program that does nothing but make calls to the libraries for GPIO, ADC, UART, Wifi, https, https server, interrupts, FreeRTOS, mqtt, nvs, chip info, logging, OTA and functions in the standard library (scanf alone uses 30kb) already takes you over the 1MB limit.
Compiling with all the logging turned off can get you a roughly 800kb program, which is still close to the limits considering that doesn't include program logic.
I'll have to look at this again when I next require some remote monitoring thing.