I would like to convert my project, which I deployed with the arduino nano 33 iot, into a custom PCB. I have already created my layout design based on the arduino schematics provided on their website.
My concern is how I am going to program the code. I have some main doubts:
The BLE module used (Nina W102), if I buy it itself and new, does it need to be programmed to receive commands from the main MCU? If so, how could I do it soldered in my PCB and which is the firmware?
To program the main MCU (new), I don´t need the bootloader, I just want to use de same code used for arduino nano 33 iot. I think I can load the HEX code directly to the microcontroller. I understand that I need a programmer and I could use another Arduino Uno to do it, am I right? Do you have the connections needed?
I guess these doubts are very easy to anwser for people who has gone through this process. Any help will be very appreciated. Thanks