Switch between AT&T, T-Mobile and Auto modes

manual-carrier-selection.cpp

// INFO ON HOW TO DETERMINE CARRIER INFO
// https://github.com/particle-iot/askengineering/issues/262#issuecomment-235049060

#include "Particle.h"

retained int netw = 0;

STARTUP(System.enableFeature(FEATURE_RETAINED_MEMORY);
        System.enableFeature(FEATURE_RESET_INFO);)

SerialLogHandler logHandler(LOG_LEVEL_ALL);

SYSTEM_MODE(SEMI_AUTOMATIC);

/* This function is called once at start up ----------------------------------*/
void setup()
{
    waitFor(Serial.isConnected,10000);
    // If we don't shut down due to Soft Power Off, make sure to deactivate PDP context sanely
    if (System.resetReason() != RESET_REASON_POWER_MANAGEMENT) {
        Serial.println("Disconnecting");
        Cellular.on();
        Cellular.command(100000,"AT+UPSDA=0,4\r\n");
        // Cellular.command(10000,"AT+CPWROFF\r\n");
    }
    Serial.println("Turning on");
    Cellular.on();
    if (++netw > 2) netw = 0;
    if (netw == 0) {
        Cellular.command(100000,"AT+COPS=2\r\n");
        Cellular.command(100000,"AT+COPS=4,2,\"310410\"\r\n");
    }
    else if (netw == 1) {
        Cellular.command(100000,"AT+COPS=2\r\n");
        Cellular.command(100000,"AT+COPS=4,2,\"310260\"\r\n");
    }
    else if (netw == 2) {
        Cellular.command(100000,"AT+COPS=2\r\n");
        Cellular.command(100000,"AT+COPS=0\r\n"); // automatic
    }
    Serial.println("Connecting");
    Cellular.connect();

    Particle.connect();
    waitUntil(Particle.connected);
    delay(6000);
    if (netw == 0) {
        Serial.println("\r\nAT&T 310410");
        Serial.println("AT&T 310410");
        Serial.println("AT&T 310410");
        Serial.println("AT&T 310410");
        Serial.println("AT&T 310410");
        Serial.println("AT&T 310410\r\n");
    } else if (netw == 1) {
        Serial.println("\r\nT-mobile 310260");
        Serial.println("T-mobile 310260");
        Serial.println("T-mobile 310260");
        Serial.println("T-mobile 310260");
        Serial.println("T-mobile 310260");
        Serial.println("T-mobile 310260\r\n");
    }
    else if (netw == 2) {
        Serial.println("\r\ndefault automatic");
        Serial.println("default automatic");
        Serial.println("default automatic");
        Serial.println("default automatic");
        Serial.println("default automatic");
        Serial.println("default automatic\r\n");
    }
}

void loop()
{

}