Hi all,
not sure if this is the right place but I got here via GitHub - femtoduino/ArduinoCore-atsamd21e18a: Arduino Core and Bootloader for the ATMEL SAM D21/R21 (E Variant) chips. and am totally lost.
I am trying to program a tiny FemtoBeacon ESP32 I just bought via an Arduino DUE (because I don't have a USB to UART converter and the DUE is already 3.3V).
I connected GND to GND, 3.3V to 3.3V on the DUE and the RX and TX pins on the FB to the RX and TX pins on the DUE (I read that you don't do the typical switch and really connect TX with TX and RX with RX in this case).
The DUE's programming port is hooked up to my USB and I even uploaded an empty sketch to it first to be safe. However the upload does not work and all I get is a warning "timed out waiting for packet header".
Can someone explain to me what else I need to set up and how I can get this to work?
Thanks so much!
EDIT:
I got an FTDI TTL-232R-3V3 adapter and hooked that up to the Femtobeacon - and still get the same error message (even when doing the "hold boot button on startup"-routine). Could really use some help here 