diff --git a/Sonoff-B1.md b/Sonoff-B1.md index 6d1e3c9b..279c80c9 100644 --- a/Sonoff-B1.md +++ b/Sonoff-B1.md @@ -9,8 +9,8 @@ Please see the [Hardware Preparation](https://github.com/arendst/Sonoff-Tasmota/ As always, you need to access the serial interface. First pop up the top part of the bulb with controlled force. The PCB as shown in the image will become visible. -The **four serial pins** (3V3, Rx, Tx, GND) as well as the GPIO0 signal line are available as test points and clearly marked. Solder wires to those or use pogo pins as you prefer. - Sonoff B1 PCB +The **four serial pins** (3V3, Rx, Tx, GND) as well as the GPIO0 signal line are available as test points and clearly marked. Solder wires to those or use pogo pins as you prefer. + As with all ESP8266 modules pulling GPIO0 to GND is needed to put the chip in programming mode. You need to **connect GPIO0 and GND** during power up. An additional GND pad is available in the middle of the PCB.