MicroPython Forum (Archive)

So maybe the pull-up resistors on SDA and SCL are missing. You can try to add 4.7 kOhm between SDL and Vcc and SDA and Vcc.

That#s not right. It should return immediately with an empty list. You can verify that with not connecting anything to the WiPy2 and run scan()

Did you power cycle the board after connecting CSB? And of you say hanging? i2c.scan() should always return. If it does not find something, it returns an empty list.

Pleasse connect CSB to Vcc, forcing to use I2C.

What kind of BME280 set-up do you use. DO you use a breakout board, and if yes, which one? Or did you just get the bare BME280 and trying to connect? I'm asking because the BME280 supports I2C and SPI connections, The selection is done trough CS. For I2C, this has to be at VDD during power on. P.S::...

It is hard to understand why against all hints you are insisting to post in this forum. Nevertheless, i tried a BME280 with a LoPy4 module, which should behave identical to the WiPy2 for this purpose. The module I tried is this one: https://www.amazon.com/BME280-Pressure-Sensor-Temperature-Barometri...

How do you try to access the files, and which board are you using?

More likely something is broken with the creation of daily builds for ESP8266

Implementing wc is surely a great work, but I personally would not use it. I have upysh.py on every device imported by main.py, and what I need & use is ls, rm, rmdir, mkdir, cd, cat. df might be the only option missing. So the whole module takes like 2k of RAM, what I think is the amount I can miss...

I just looked at the source code and the data sheet. I have no BME280 at hand, but an ESP32 module with the WiPy2 firmware. but since you have that available, you can easily try yourself.