have a raspberry pico w connected to a monk makes plant monitor using the uart/serial port of the pico. monitoring soil moisture of my balcony garden all worked while connected to the usb-c of my macbook air for firmware development. then switched to a power adapter and now it can’t read stable data anymore. tried all kinds of cable, power adapter and what not. but as soon as i connect the pico to the macbook it all works. wtf. spent half a day debugging and then gave up. don’t get it…
1 month ago
@whixr thats a good checklist. thank you! · 1 month ago
@danrl Common debugging checklist: Good GND between pi and sensor? Did the power source for the sensor change and is it getting enough current? Solid connections on the RX/TX lines? OS is set to not use the hardware UART as a getty? User polling the serial port has perms to access the port? · 1 month ago
yeah, it boots, wifi and web server is up. all sensor readings look valid, including the non-moisture ones from the plant monitor. think it is not the rs232 but the moisture sensing (lack of power?) the value is swinging heavily. · 1 month ago
@danrl Are you certain it is booting? Monitoring sensor data over wifi? · 1 month ago