All Questions
Tagged with bootloader pins
5
questions
0
votes
2
answers
1k
views
D1 mini esp8266 error: esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header
I am pretty sure this device worked yesterday. I tried to short GPIO0 to ground (flash), nothing.
I have a second ESP that uploads fine, but this one does not.
Is their another way to get this ...
1
vote
3
answers
12k
views
How can I get my (Arduino) Pro Micro schematic to allow me to program it through GPIO instead of USB
I'm trying this project so far I've got the schematic of a Pro Micro, which is powered through GPIO from a Raspberry Pi Zero, and want to remove the micro usb connection and able to flash it using an ...
0
votes
1
answer
889
views
Use ESP8266 GPIOs after Flash Startup
I'm a bit confused about the ESP8266 launching and GPIO behaviour.
When I'm programming the ESP8266 I have to set GPIO2 high and GPIO0 low.
But when I want to use the ESP8266 in my project I have to ...
3
votes
1
answer
6k
views
NodeMCU does not boot up when GPIO pin is high
I have a NodeMCU board connected to a door and there is a micro switch that makes one GPIO pin (GPIO15 - D8 in this specific case) go high when the door opens.
My problem is if I lose power while the ...
7
votes
1
answer
3k
views
Pin 13 fires relay when powering on... How to disable?
Pin 13 fires relay when powering on... How to disable?
I'm using pro mini 5v 16MHz and a DC 12V 2 Channel Relay Module Optocoupler. The relay Jd-VCC is powered by a 12V and it's VCC is 5V (the same as ...