UPDATE2: I think I found the issue, but not the solution yet. The expansion board looks like stuck in DFU mode, so it's an expansion board issue i think. I tried an other expansion board, and works okay. So how can I unstuck it? :D Thanks in advance

@paul-thornton Just did. :)

@robert-hh thanks. ill try and sort out some VM's and give that ago.

@robert-hh Es läuft jetzt. Ds Update ging nicht weil ich das Board für den Fipy überbrückt habe das es im batterie Modus läuft. nach entfernen des kabels ging auch das Update. Jetzt kann es weiter gehen. Danke für deine Mithilfe.

@brewnut The RTS pin is not used by the firmware, but driven by the UAB/UART bridge. But you can also use another pin, like P6.

@robert-hh Thanks, I'll try that.

@ldbm we don't publish schematics of our products, sorry.

Thx @robert-hh !

@eric-waai Yes it was a typo I have 3 i2c devices

@fedesilvi Just to give you an impression how bad the esp32 ADC is, I collected 10000 samples with the ESP32 ADC and an ADS7818 ADC taking values the same LM385 voltage reference. The absolute values differ, because of the different ranges (5V vs. 3.3V). The histograms are below: Edit: Adding a 10 nF capacitor close to the ESP32 ADC input and switching off WiFi improved the picture. The one above was WITH the capacitor. Without, the capacitor, it was worse (avg +/-100 readings)

@dr_aloui In that case it's strange. You you have an oscilloscope to look at the signal timing? The expansion board should not add any significant load to the wires, at least not to P9 and P10. The Pyboard has built-in pullup-resistors on the pins dedicated for I2C (X9/X10 and Y9/Y10). That could makes a difference.

I have email send method implemented in my MycroPython port as a part of the curl module. I think it could be easily ported to Pycom's MicroPython (curl_mail.c, modcurl.c)...

I confirm that wlan.antenna(WLAN.EXT_ANT) works with Pycom firmware > 1.18.1.r1.

@fedesilvi I recommend you try PySimpleGUI It's much easier to program a GUI in PySimpleGUI than PyGame. Do you have tkinter on your platform? You should be able to hook up your GUI to anything you want. To display your information, read the data using your code, then plot the data using a Matplotlib / Pyplot call. You can then display that graph in your GUI. There is extensive documentation on how to use it and there are several example programs posted the demonstrate hooking it up to Matplotlib.