On the atsamd21 development board, I used hc-05 and blynk RTC widgets for time updates

Kebrave · September 25, 2019, 6:23am

On ordinary AVR microcontrollers, such as arduino uno, the above combination is normal and works perfectly. But the problem that arises when porting to the atsamd21 development board, #include <SoftwareSerial.h>, without this library, what should I do?

RTC.ino:6:10: fatal error: SoftwareSerial.h: No such file or directory

PeteKnight · September 25, 2019, 6:30am

That type of error message usually means that your compiler can’t find the library hat it’s looking for.

Pete.

Kebrave · September 25, 2019, 9:25am

I know, but why is there no software serial library for samd21 and blynk? I have found a solution right now. Because samd21 has a hardware serial port 1, and usb does not conflict with this.

PeteKnight · September 25, 2019, 9:39am

SoftwareSerial is a 3rd party product. You’d need to ask the developer why this hardware isn’t supported.

As far as Blynk support is concerned, I thought the Arduino Zero was a SAMD21 based board, and the Zero is supported by Blynk according to this:

github.com

blynkkk/blynkkk.github.io/blob/master/SupportedHardware.md

# Supported Hardware

**Attention!** This documentation is for the LEGACY version of Blynk platform which is no longer supported.  
Please check out the [**new documentation**](https://docs.blynk.io)


Blynk supports more than 400 boards already, including support for Arduino, Particle, ARM mbed, TI Energia, MicroPython, Node.js, OpenWRT and many Single Board Computers. You can add your own connection types easily (see [these](https://github.com/blynkkk/blynk-library/tree/master/examples/More/ArduinoClient) examples for Arduino)!

## Platforms

- **Arduino** (https://github.com/blynkkk/blynk-library)
  - Arduino MKR WiFi 1010
  - Arduino MKR GSM 1400
  - Arduino MKR NB 1500
  - Arduino Uno, Duemilanove
  - Arduino Nano, Mini, Pro Mini, Pro Micro, Due, Mega
  - Arduino 101 (Intel Curie, with BLE)
  - Arduino MKR1000
  - Arduino Zero
  - Arduino Yún (onboard WiFi and Ethernet, via Bridge)

This file has been truncated. show original

Pete.

vere · October 12, 2020, 10:35am

I don’t realy understand this yet but maybe there is no software serial because there are options for a second hardware serial. check out