From 6d6aaef7fd80072fc803244657c22b407ecccc44 Mon Sep 17 00:00:00 2001 From: gajotnt Date: Thu, 6 Apr 2017 11:04:28 +0000 Subject: [PATCH] Updated Hardware Preparation (markdown) --- Hardware-Preparation.md | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Hardware-Preparation.md b/Hardware-Preparation.md index 3b19582d..0360bc70 100644 --- a/Hardware-Preparation.md +++ b/Hardware-Preparation.md @@ -69,7 +69,8 @@ I was unable to pair the Sonoff RF 434MHz receiver with any of my KaKu switches alternate GPIO 0 spot Programming the Sonoff Dual is more difficult as the on-board-button is not connected to GPIO0. Pulling GPIO0 to GND is needed to put the ESP8266 in programming mode during power up. -As always, you need to solder a 4 pin header for the serial interface (connector on the short end of the PCB). GPIO0 can be found in the small inter layer [via](https://en.wikipedia.org/wiki/Via_(electronics)) shown in the right image. Using the GND pin from the button 0 / button 1 header connect the via during power up. Attention: If the via is covered by silk screen (green) you need to expose the underlying conductive (copper) by careful scratching. If you dont feel confortable with scratching the track to expose the copper, you can unscrew the dual and on the underside connect GND to the spot specified on the left image. +As always, you need to solder a 4 pin header for the serial interface (connector on the short end of the PCB). GPIO0 can be found in the small inter layer [via](https://en.wikipedia.org/wiki/Via_(electronics)) shown in the right image. Using the GND pin from the button 0 / button 1 header connect the via during power up. Attention: If the via is covered by silk screen (green) you need to expose the underlying conductive (copper) by careful scratching. +If you dont feel confortable with scratching the track to expose the copper, you can unscrew the dual and on the underside connect GND to the spot specified on the left image. The 4 pin header in the middle, which is normally not present, is not needed but might be used in programming the ESP8266 as there must be a better way for itead to get the initial code loaded ...