All Questions
24 questions
3
votes
0
answers
103
views
Why RTU bridge timeout even though answer is received?
I'm testing the following code as a bridge between https://sourceforge.net/projects/qmodmaster/ and https://pypi.org/project/pyModSlave/.
As hardware, I'm using a NodeMCU 1.0 and a USB/TTL converter.
...
- 31
2
votes
2
answers
1k
views
ESPAsyncWebServer code not compiling
Error messages
Arduino: 1.8.14 Hourly Build 2020/12/15 11:33 (Windows 10), Board: "Generic ESP8266 Module, 80 MHz, Flash, Disabled (new aborts on oom), Disabled, All SSL ciphers (most ...
- 21
1
vote
1
answer
214
views
Why does the send pin influence the receive pin with Arduino Capacitive Sensing Library
I'm trying to figure out how the Arduino Capacitive Sensing Library https://playground.arduino.cc/Main/CapacitiveSensor/ works. It says:
When the send pin changes state, it will eventually change the ...
- 115
0
votes
1
answer
2k
views
Reading SNMP V2 OID from ESP8266/ESP32
i need to read from my ESP32/ESP8266 some SNMP V2 OID values from my home printer: it exists a library/method that can do that?
I've seen some SNMP agents, but they works only with the devie as server ...
- 167
1
vote
0
answers
704
views
Error compile board LOLIN(WEMOS) D1 R2 & mini
I have a wemos d1 mini and a mpu 6060 sensor. I am trying to send the data from the sensor to Firebase. However i have come across a hurdle which i cant seem to solve. This is my error, can you help ...
- 21
0
votes
2
answers
256
views
How to change wifi credentials of multiple ESP8266 together
I need to change WiFi credentials of multiple ESP8266 in one go, without needing to change passwords for each of them individually. I know there is a WiFiManager library, which makes your ESP8266 ...
0
votes
1
answer
2k
views
ESP8266 compilation error: "previous declaration of 'HTTPMethod HTTP_HEAD'"
I have an ESP8266 program that used to work but is now failing to compile with this error:
C:\...\Arduino\libraries\WiFiManager/WiFiManager.h:25:24: note: in expansion of macro 'PROGMEM'
const ...
- 159
0
votes
1
answer
3k
views
Wiring ESP8266 and PN532
I'm trying the Android Hce example in this PN532 library. I can't find how to set SDA and SCL address in the code, so I tried connecting them in CLK and SD0 pins. The serial monitor gives me "Didn't ...
- 21
2
votes
2
answers
894
views
ESP12E Soft WDT reset stack trace leads to libraries
Im using ESP12E DevKit v2 (esp8266 wifi module) board for controlling relays and displaying DHT22 temp,humidity on web server.
It runs smoothly when the web client is closed but when i leave the ...
- 41
0
votes
1
answer
253
views
Invoke a method in the main sketch from within a library
I need to use a specific library that issues error messages in the form of String texts. The library uses the Serial.println() function to send the messages to the Arduino IDE's serial monitor.
The ...
0
votes
2
answers
738
views
ESP8266 library: 2 requests received instead of 1
I have a strange issue with my sketch using WiFiEsp.h library from https://github.com/bportaluri/WiFiEsp
When i send 1 request to my ESP8266 from my browser as http://192.168.0.25
, it seems that my ...
- 85
2
votes
1
answer
6k
views
How to transmit string data using the rc-switch library?
I am using the rc-switch library for sending and receiving data. In rcswitch library, there is no method to send string data. I am using below method to send the string message in char buffer.
...
- 123
2
votes
0
answers
4k
views
WifiEsp client TIMEOUT when put on a loop
Hello I have been using the WifiEsp to send and receive data from Thingspeak.
All is well until I put my http request on the Void Loop() section.
My Goal: I want to receive data every loop not on ...
- 139
1
vote
1
answer
585
views
Thingspeak Library returns 0 using ESP8266 on Arduino
I have tried using the thingspeak-arduino library and tested some of the examples:
#include <WiFi.h>
#include <WiFiClient.h>
#include <SPI.h>
#include <ThingSpeak.h>
char ...
- 139
0
votes
2
answers
536
views
Weird issue with software serial?
Hi i am trying to write a library to communicate between the arduino and the esp 8266. I wrote a command that that sends an AT command to the esp chip. So far I have tested these commands : AT, AT+GMR,...
- 1