curiouscarbon
Science Penguin
- Joined
- Jun 29, 2020
- Messages
- 3,022
i connected a victron blue solar UART to a SAMD21 microcontroller that uses 3.3 system and logic voltage. the MPPT UART output is 5.0 logic voltage so i made a two resistor voltage divider to convert the 5V logic signals to 3V logic signals which work safely with the microcontroller UART input pin. it reads the data properly
here is an extremely low quality diagram to illustrate the circuit
perhaps this type of voltage divider could be helpful to some attempting connection to BMS UART
edit: photo of circuit
it only does RX, but that’s only because i don’t need TX wire in this situation
here is an extremely low quality diagram to illustrate the circuit
perhaps this type of voltage divider could be helpful to some attempting connection to BMS UART
edit: photo of circuit
it only does RX, but that’s only because i don’t need TX wire in this situation