emreer3442
Newbie
Hello everyone who love microchips! Last year I use SMT32F446RET microchips. It kind a good chip for Rocket avionics PCB. I ran into many problems about I2C port. I thought using external pull-up resistor for more powerful logic is nice but i could not run my barometric sensor (BMP180-BMP280) on my PCB. After I rip off these pull-up resistors(connected to SDA-SCL pins, 4k7ohm), problem is solved why this happened I still not understand. If any one know what happened this stuff, please tell me I will be really appreciated.