Yesterday I ordered digital multi-meter.
Today I got that and from now on I can measure the voltages.
At first, I checked that the VCC level in the Grove Shield is 5V (TTL)
However the VCC level of Grove connectors in Wio Terminal is 3.3V (not TTL level)
Is this the reason why I cannot use serial connections?
What is your opinion about this?
I will check the VCC requirement of the TF mini LiDAR from now.
If you know something about this, please let me know.
I found that the followings in the one of the examples.
#if defined(ARDUINO_ARCH_SAMD)
#define uart Serial1
#else
SoftwareSerial uart(2, 3);
#endif
When I tried D2,D3 of UNO + Grove Shield. it works.!!!
However tried D0,D1 of Right Grove conn. of the Wio Terminal, it doesn’t work.
with the followings
SoftwareSerial uart(0, 1);
I think this is mainly due to the Vcc voltage problem also.