From 97c1eb67a69374227c0ac2d0ad2508044b2bef47 Mon Sep 17 00:00:00 2001 From: Michael Miller Date: Sun, 18 Dec 2016 12:02:58 -0800 Subject: [PATCH] Created FAQ #10 (markdown) --- FAQ-#10.md | 8 ++++++++ 1 file changed, 8 insertions(+) create mode 100644 FAQ-#10.md diff --git a/FAQ-#10.md b/FAQ-#10.md new file mode 100644 index 0000000..682068c --- /dev/null +++ b/FAQ-#10.md @@ -0,0 +1,8 @@ +### On my ESP8266 when I flash the sketch the LEDs light up, is this normal? +Yes it is normal for both DMA and UART to have this side effect. +The UART is used to program the ESP, both DMA and UART are using the low level hardware that is also used for serial/uploads; so this can happen. They are reacting to the serial data being sent across the wire and get fooled into thinking its something when its just code being flashed. + +Since the LEDs need 5v, when I prototype I usually run a switch that I can turn them off when I upload; and the final project just doesn't get flashed. + +NOTE: OTA (over the air) flashing should not cause this. +NOTE: Some have said that using the UART method causes less flashing. \ No newline at end of file