Hi,
Did use for several projects already clone Arduino's from AliExpress without any problems regarding the compatibility with the Arduino main stream.
For the last order, I didn't look very closely to the brand of the clone, finding me know with some problems.
I ordered some WavGat Arduino uno boards (https://www.aliexpress.com/item/high-quality-One-set-UNO-R3-CH340G-MEGA328P-for-Arduino-UNO-R3-USB-CABLE-ATMEGA328P-AU/32810623079.html)
If I can believe the information given, they are using an ATMEGA328P clone as processor.
After some tweaking of the specific WavGat Arduino drivers (they are not really maintained by the manufacturer to follow the new Arduino 1.8.x branch 
), I could compile the sketches without errors.
The blinking led sketchs worked without any problem. The next step was an example of MySensors, drivers, AltSoftSerial, the serial monitor is outputting data (example uses 9600 baud). So far, so good.
The next example was a distance sensor (example from the site): result was garbage in the serial monitor.
I activated MY_DEBUG, same result, garbage in the serial monitor.
Tested at several bauds : 300, 2400, 9600, … : all same result, garbage.
The same script works like a charm on a real Arduino board, so it is not a programming error in the sketch.
So for testing, I created a minimum script with only a serial print "hello world". Works! No garbage in the serial monitor.
Started to add the first lines specific for MySensors
#define MY_DEBUG
#define MY_RADIO_RFM69
#define MY_BAUD_RATE (9600ul)
#include <SPI.h>
#include <MySensors.h>
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
}
void loop() {
// put your main code here, to run repeatedly:
Serial.print("hello world");
Serial.println();
}
When adding the #include <MySensors.h>, the serial monitor begins with outputting garbage.
So it is clearly that somewhere in the MySensors library something happens to produce this.
Very probably it is due to the no 100% compatibility of the WavGat Arduino.
The problem: where to begin the debug?
I searched the site, but till now, didn't find any information to guide me in the correct direction.
