ESP32 prints some weird characters on i2c lcd using AsyncWebServer

[gbaranski]

Hi, I use github.com/me-no-dev/ESPAsyncWebServer library for WiFi, SSD1306 from Adafruit for lcd, I coded something like this, on request "/setAlarm" ESP prints on LCD string "testing", but that prints me weird characters, code lloks like that, calling the same function from any different class works, only doesnt work if called from asynwebserver library

Code: [Select all] [Expand/Collapse]

1. void ManageWifi::setupServerHandling() {
2.     server.on("/getTimeData", HTTP_GET, [] (AsyncWebServerRequest *request) {
3.         request->send(200, "text/plain", R"({"currentTime":")" + wifiTimeManager.getTime() + "\"}");
4.         Serial.print("received/get");
5.     });
6.     server.on("/setAlarm", HTTP_GET, [](AsyncWebServerRequest * request) {
7.         if(request->hasParam("time")) {
8.             AsyncWebParameter* p = request->getParam("time");
9.             Serial.printf("Received %s with value %s from IP: \n", p->name().c_str(), p->value().c_str());
10.             Serial.println(request->client()->remoteIP());
11.             request->send(200, "text/plain", "OK");
12.             wifiTimeManager.saveAlarmTime(String(p->value()));
13.             String outputMsg = "New request!\n Time: " + String(p->value()) + "\n IP: " + request->client()->remoteIP().toString();
14.  
15.             lcdManager.printTextLcd("testing", 1);
16.         }
17.     });
18.     server.onNotFound(notFound);
19.     server.begin();
20. }

GeSHi © Codebox Plus Extension

I tried using xTaskCreate but that gave me same error.

Code: [Select all] [Expand/Collapse]

1. void ManageLcd::printTextLcd(String lcdText, int fontSize){
2.     clearLcd();
3.     display.setTextSize(fontSize);
4.     display.print(lcdText);
5.     display.display();
6.     delay(1000);
7. }
8.  
9.  
10.  
11. void ManageLcd::clearLcd() {
12.     display.setTextColor(WHITE);
13.     display.setCursor(10, 0);
14.     display.clearDisplay();
15.  
16.     display.display();
17. }

GeSHi © Codebox Plus Extension

Screenshot 2020-04-09 at 18.19.45.png (218.64 KiB) Viewed 6112 times

that shows how it looks like for me

[ESP_Me-no-dev]

You are not sending a response to the request in the alarm handler You must request->send(response) in every handler.

[gbaranski]

I do at line 11

[ESP_Sprite]

Moved to the Arduino subforum.