BlynkSimpleEsp8266 and arduinojson conflict

Need Help With My Project
1

Code:

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <ArduinoJson.h>
char ssid[] = "xxxx";
char pass[] = "xxxx";
char auth[] = "xxxx";

BLYNK_WRITE (V1) {
  int val = param.asInt();
  Serial.println(val);
}

void setup() {  
  Serial.begin(115200);
  delay(100);
  WiFi.begin(ssid, pass);
  Blynk.config(auth);
}

void loop() {
  Blynk.run();
}

Error:

c:\Users\ehraz\Documents\Arduino\libraries\Blynk\src/Blynk/BlynkHandlers.h:25:13: error: expected unqualified-id before numeric constant
c:\Users\ehraz\Documents\Arduino\libraries\Blynk\src/Blynk/BlynkHandlers.h:25:13: error: expected '{' before numeric constant
   25 | #define V6  6
      |             ^
c:\Users\ehraz\Documents\Arduino\libraries\Blynk\src/Blynk/BlynkHandlers.h:25:13: error: expected unqualified-id before numeric constant

exit status 1

Compilation error: exit status 1

It is only happening when initializing arduinojson and blynkesp8266 library together.
Can anyone tell me why it is happening.

Not happening when the arduinojson library is v.6.20.0

2

Can you explain this statement further?
What version of the Blynk library are you using?

Pete.

3

The error is only occurring when I am using ArduinoJson library v6.21.0
It is not happening with library version 6.20.0
Blynk library version is 1.2.0

1 Like
4

I have the same issue described above.

5

I had the same problem and solved (avoided?) the issue using Arduino_Json.

6

I rolled back to the 6.20.0 version and got it to compile. The issue I am having now is that all of my sketches that use wifimanager will not work properly. The device goes into an infinite wdt reset loop. I think there is something with the two (BLYNK and ArduinoJson) libraries that is conflicting. I don’t have time to really troubleshoot the issue until this weekend, but have one device offline cause of this. I was going to make a small change to one of my devices, and decided to update all of my libraries first (it had been a while since doing any tinkering on Arduino IDE). Once I updated I tried to recompile my existing sketch (made no changes). I ran into this issue with the libraries conflicting and once I got that figured out (by rolling back ArduinoJson to 6.20.0), I uploaded it to my device and now it just keep resetting. Serial monitor shows a bunch of stuff about reboot reason, and WDT reset. As mentioned I have a bit of troubleshooting to do this weekend, but best believe I won’t be messing with my other working devices.

7

same for me with ESP32 and ArduinoJson library v6.21.0 and Blynk 1.2
v6.20.0 works