Ok Jimer, just before the end of this year I solved. The BV104 is OK, as I said, but looking at PIN on the BV508 cheching the connection as you said, I found a bad welding on the G pin of the BV508! So I ask myself "how the package was tested? Maybe the test was a just one shot test and the welding worked well just 1 time!!" I remake that and all is ok: now I can see 1 LED on theby aldex - ByPic
Tanks for the replay, but I have made this check before: wathever I write in white color, after I give a return I receive (the echo) in yellow color. The driver is correct and functioning, I also downloaded from Silabs the software from the AN 223 "CP210xPortReadWrite.exe" so I can read the GPIO found on the BV104. So I can say that the BV104 is properly working. 1) How I can testby aldex - ByPic
I have the same problem: No welcome screen! I have IoT Wi-Fi GPIO (BV508 with ESP8266)+BV104 (USB to Serial Bridge); all connections are correct, I checked the echo crossing RX to TX on the BV104 (so driver are correct and functioning). Starting BvSerial I can see on the screen: in green color this 3 raw Available ports: COM28by aldex - ByPic