Limitations Can’t program large memory sizes, e.g. ATmega2560
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Serial Port Programming
Programming an Arduino using the serial port Generally the Tools > Programmer selection is only used for Tools > Burn Bootloader and Sketch > Upload Using Programmer and is not used for standard uploads. “Programmer” setting For standard uploads you can set Tools > Programmer to anything you like because it will have no effect. […]
USBasp
Seems a popular choice and able to program larger devices such as the Mega2560 There’s a jumper to select 3V3 or 5V – make sure you use it!!! USBasp main page: https://www.fischl.de/usbasp/ Installing Windows Driver On windows you need to install a driver for it. Windows driver page: https://zadig.akeo.ie/ Its a run the exe program, […]
Program won’t run
Waiting for USB Serial Are you using this with your Serial.begin command on an Arduino with USB serial? We found on the MKR GSM 1400 and Arduino Micro this would cause the program to not run if the Arduino serial monitor was not open! Doing this fixed it:
Soft Reset
LED Pin
Always given the IO pin define: LED_BUILTIN Will be automatically set as an output
MKR GSM 1400
Product page: https://store.arduino.cc/mkr-gsm-1400 Arduino guide page https://www.arduino.cc/en/Guide/MKRGSM1400 Arduino GSM Library: https://www.arduino.cc/en/Reference/MKRGSM https://github.com/arduino-libraries/MKRGSM Schematic: https://content.arduino.cc/assets/MKRGSM_V2.2_sch.pdf GSM Specs 3G with 2G fallback Serial ports USB connector – virtual serial port using the Serial object Serial1 – Hardware serial port on pins 13/14, instead Reset button Reset button causes the microcontroller to reset and resets USB communication. IO […]
Registers
Setting microcontroller registers directly Examples Reading microcontroller registers directly Examples
Arduino Mega2560
https://store.arduino.cc/mega-2560-r3 Microcontroller: ATmega2560https://www.microchip.com/wwwproducts/en/atmega2560 Power Power in: From the USB connectors (5V) or the DC plug (7-12V) 5V reg: LD1117S50CTR, 2%, 1V dropout, 800mA output current rated IO Pins IO voltage: 5V IO pin high voltage (for VCC = 5V): min 0.6VCC to max VCC + 0.5So digital IO pins are compatible with 3.3V input signals. IO […]