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Results tagged with nodemcu
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user 43826
For questions about NodeMCU, an open source IoT platform which includes firmware for running on the ESP8266.
2
votes
1
answer
1k
views
Use external power - nodemcu 0.9
I'd like to deploy my project so I'm looking for a way to power the nodemcu.
I'd like to know if there's a way to power it with a 9V battery without any other external circuit. … Until now I've found information for the nodemcu 1.0 and it supports up to 20V on the VIN port. …
- 195
4
votes
1
answer
8k
views
Turn off the second builtin Nodemcu 0.9 led
Unfortunately the nodemcu turn on a blue led while I'm idle (during delay(ms))
Here is my code:
#define LED 16
void setup() {
initialSetup();
//Turn off the built-in led
digitalWrite(LED, HIGH …
- 195
0
votes
1
answer
598
views
Import library in Arduino IDE
I'm trying to use an HX711 load cell amplifier with my NodeMCU 0.9. I've found this library on Github and, following this guide, I tried to use it. …
- 195
-1
votes
1
answer
574
views
Camera on mkr1000 or nodemcu 0.9
My question is: it is possible to connect camera on an Arduino/Genuino mkr1000 or to a NodeMCU 0.9?
If yes which one? … As far as I now ArduCam OV2640 has ported a library for ESP8266 (that is the chip inside the nodemcu)? Where can I find it and how does I plug the camera to the board? …
- 195
1
vote
0
answers
612
views
Soft WDT with HX711 and PubSubClient libraries
I'm using NodeMCU 0.9
My sketch crashes if the following 2 include are present in the sketch:
#include <PubSubClient.h>
#include <HX711.h>
I obtain a Soft WDT reset
If I do not use HX711 I can send …
- 195
1
vote
0
answers
863
views
Follow redirect of a captive portal with NodeMCU 0.9
Trying to connect to a free wifi with a Nodemcu 0.9.
What I have already done? …
- 195
1
vote
1
answer
91
views
NodeMCU 1.0 - Port D3, relay and pump does not boot
I'm trying to create a watering system using a NodeMCU 1.0, a relay and some pumps.
Currently I've port D0, D1, D2, D5, D6, D7, D8 already in use. … I'm trying to use the port D3 (GPIO0) as follows, but when I plug or reboot the NodeMCU, sometimes (!) at boot the relay starts, the pump starts watering and the board does not finish the boot. …
- 195
0
votes
1
answer
3k
views
MQTT not working on ESP8266 (Nodemcu 0.9)
I'm trying to use NodeMCU on my ESP8266 (NodeMCU 0.9) but the board keep crashing and I don't understand why. …
- 195