I'm currently working with an ESP8266 NodeMCU V3 and an IR transmitter breakout board. The module receives NEC IR commands trough a HTTP request and then sends them trough the IR transmitter. Getting the command from the HTTP request and sending static (pre-programmed) IR NEC commands works perfectly. The problem however is that the NEC IR command I receive trough HTTP is in a String variable/data type (after processing). irsend.sendNEC(); however requires uint64_t as the input type, according to the error message I get in the Arduino IDE.
I don't really know my way around C data types to be honest. Searches like "Arduino String to uint64_t" have came up empty or reversed. One post came close to what I'm trying to accomplish, but irsend.sendNEC(strtoul(irrequest)); didn't do the trick either.
Arduino code;
- Check for
// Send IR NEC commandalmost at the bottom - The second and third
irsend.sendNEC();are an example and not in the final code - HTTP request is formatted like http://192.168.1.xxx/rest/ir/nec/0xFB0042BD
Sketch.ino
// Configuration
const char* CONFIG_SSID = "mywifi";
const char* CONFIG_PSK = "wifipassword";
const int CONFIG_SERIAL = 115200;
const int CONFIG_PORT = 80;
const int CONFIG_TIMEOUT = 5000;
const int CONFIG_IRTPIN = 2;
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
// Include libraries
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <IRremoteESP8266.h>
#include <IRsend.h>
#include <IRrecv.h>
#include <IRutils.h>
// Create webserver object
WiFiServer server(CONFIG_PORT);
// Create IR Send object
IRsend irsend(CONFIG_IRTPIN);
// Setup instructions
void setup() {
// Start serial and LED
Serial.begin(CONFIG_SERIAL);
Serial.println();
Serial.println("Starting setup");
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, 1);
// Start WiFi connection
Serial.print("Connecting to: ");
Serial.println(CONFIG_SSID);
WiFi.mode(WIFI_STA);
WiFi.begin(CONFIG_SSID, CONFIG_PSK);
// Wait for WiFi connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println();
Serial.println("WiFi connected!");
// Print WiFi connection information
Serial.print(" SSID: ");
Serial.println(WiFi.SSID());
Serial.print(" RSSI: ");
Serial.print(WiFi.RSSI());
Serial.println(" dBm");
Serial.print(" Local IP: ");
Serial.println(WiFi.localIP());
// Start webserver
Serial.println("Starting webserver...");
server.begin();
delay(1000);
Serial.println("Webserver started!");
// Print webserver information
Serial.print(" Host: ");
Serial.println(WiFi.localIP());
Serial.print(" Port: ");
Serial.println(CONFIG_PORT);
// Start IR Send
Serial.println("Starting IR Send...");
irsend.begin();
delay(1000);
Serial.println("IR Send started!");
// Setup complete
Serial.println("Setup completed");
digitalWrite(LED_BUILTIN, 0);
Serial.println();
}
// Loop instructions
void loop() {
// Wait for new client
WiFiClient client = server.available();
if (client) {
// New client
digitalWrite(LED_BUILTIN, 1);
Serial.println("New client connected");
// Wait nicely for the client to complete its full request
unsigned long timeout = millis() + CONFIG_TIMEOUT;
Serial.println("Waiting for client request to finish...");
while (!client.available() && millis() < timeout) {
delay(1);
}
// End client connection when timeout is reached to not hold up availability
if (millis() < timeout) {
Serial.println("Client request finished!");
} else {
Serial.println("Client request timeout!");
client.flush();
client.stop();
digitalWrite(LED_BUILTIN, 0);
Serial.println();
return;
}
// Catch client request
String req = client.readStringUntil('\r');
Serial.print("Request header: ");
Serial.println(req);
if (req.indexOf(F("/rest/ir/nec/")) != -1) {
// Get IR Send NEC request
String irrequest = req;
irrequest.remove(0, ((irrequest.lastIndexOf("/rest/ir/nec/")) + 13));
irrequest.remove((irrequest.indexOf(" ")));
Serial.print("IR Send NEC code: ");
Serial.println(irrequest);
// Send IR NEC command
Serial.println("Sending IR NEC command");
irsend.sendNEC(irrequest); // <<< here lays the problem
irsend.sendNEC(0xFB0042BD); // This works
irsend.sendNEC("0xFB0042BD"); // This doesn't
// Send HTTP response
Serial.println("Sending HTTP/1.1 200 OK");
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/plain");
client.println("Connection: close");
client.println();
client.println("OK");
} else {
// Invalid request
Serial.println("Invalid client request");
Serial.println("Sending HTTP/1.1 404 response");
client.println("HTTP/1.1 404 Not Found\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html><body>Not found</body></html>");
}
// Flush output buffer
Serial.println("Flushing output buffer");
client.flush();
digitalWrite(LED_BUILTIN, 0);
Serial.println();
return;
}
}
irsend.sendNEC(strtoul(irrequest.c_str(), NULL, 10));cplusplus.com/reference/cstdlib/strtoul arduino.cc/reference/en/language/variables/data-types/string/…