Hello,
I try to start something very new for me, GSM with ESP32 with onboard SIM800L.
I used an example code, and had following return form debug :
AT
AT
�AT
OK
AT&W
OK
AT+CFUN=0
OK
AT+CFUN=1,1
OK
AT
�AT
OK
ATE0
OK
AT+CMEE=0
OK
AT+CLTS=1
OK
AT+CBATCHK=1
OK
AT+CPIN?
ERROR
AT+CPIN?
+CPIN: SIM PIN
OK
AT+CPIN?
+CPIN: SIM PIN
OK
AT+CPIN="1234"
OK
AT+CIPSHUT
ERROR
AT+SAPBR=3,1,"Contype","GPRS"
ERROR
AT+SAPBR=3,1,"APN","free"
ERROR
AT+CGDCONT=1,"IP","free"
ERROR
AT+CGACT=1,1
ERROR
AT+SAPBR=1,1
ERROR
AT+SAPBR=2,1
ERROR
can someone tell me if this seems to be programm error, or to mobile network connection problem like antenna problem?
thanks a lot in advance
code :
// Your GPRS credentials (leave empty, if not needed)
const char apn[] = "free"; // APN (example: internet.vodafone.pt) use https://wiki.apnchanger.org
const char gprsUser[] = ""; // GPRS User
const char gprsPass[] = ""; // GPRS Password
// SIM card PIN (leave empty, if not defined)
const char simPIN[] = "1234";
// Server details
// The server variable can be just a domain name or it can have a subdomain. It depends on the service you are using
const char server[] = "http://89.86.42.115"; // domain name: example.com, maker.ifttt.com, etc
const char resource[] = "/add_LifeStamp.php"; // resource path, for example: /post-data.php
const int port = 80; // server port number
// Keep this API Key value to be compatible with the PHP code provided in the project page.
// If you change the apiKeyValue value, the PHP file /post-data.php also needs to have the same key
String apiKeyValue = "tPmAT5Ab3j7F9";
// TTGO T-Call pins
#define MODEM_RST 5
#define MODEM_PWKEY 4
#define MODEM_POWER_ON 23
#define MODEM_TX 27
#define MODEM_RX 26
#define I2C_SDA 21
#define I2C_SCL 22
// Set serial for debug console (to Serial Monitor, default speed 115200)
#define SerialMon Serial
// Set serial for AT commands (to SIM800 module)
#define SerialAT Serial1
// Configure TinyGSM library
#define TINY_GSM_MODEM_SIM800 // Modem is SIM800
#define TINY_GSM_RX_BUFFER 1024 // Set RX buffer to 1Kb
// Define the serial console for debug prints, if needed
#define DUMP_AT_COMMANDS
#include <Wire.h>
#include <TinyGsmClient.h>
#ifdef DUMP_AT_COMMANDS
#include <StreamDebugger.h>
StreamDebugger debugger(SerialAT, SerialMon);
TinyGsm modem(debugger);
#else
TinyGsm modem(SerialAT);
#endif
// I2C for SIM800 (to keep it running when powered from battery)
TwoWire I2CPower = TwoWire(0);
// TinyGSM Client for Internet connection
TinyGsmClient client(modem);
#define uS_TO_S_FACTOR 1000000UL /* Conversion factor for micro seconds to seconds */
#define TIME_TO_SLEEP 3600 /* Time ESP32 will go to sleep (in seconds) 3600 seconds = 1 hour */
#define IP5306_ADDR 0x75
#define IP5306_REG_SYS_CTL0 0x00
bool setPowerBoostKeepOn(int en) {
I2CPower.beginTransmission(IP5306_ADDR);
I2CPower.write(IP5306_REG_SYS_CTL0);
if (en) {
I2CPower.write(0x37); // Set bit1: 1 enable 0 disable boost keep on
}
else {
I2CPower.write(0x35); // 0x37 is default reg value
}
return I2CPower.endTransmission() == 0;
}
void setup() {
// Set serial monitor debugging window baud rate to 115200
SerialMon.begin(115200);
// Start I2C communication
I2CPower.begin(I2C_SDA, I2C_SCL, 400000);
// Keep power when running from battery
bool isOk = setPowerBoostKeepOn(1);
SerialMon.println(String("IP5306 KeepOn ") + (isOk ? "OK" : "FAIL"));
// Set modem reset, enable, power pins
pinMode(MODEM_PWKEY, OUTPUT);
pinMode(MODEM_RST, OUTPUT);
pinMode(MODEM_POWER_ON, OUTPUT);
digitalWrite(MODEM_PWKEY, LOW);
digitalWrite(MODEM_RST, HIGH);
digitalWrite(MODEM_POWER_ON, HIGH);
// Set GSM module baud rate and UART pins
SerialAT.begin(115200, SERIAL_8N1, MODEM_RX, MODEM_TX);
delay(3000);
// Restart SIM800 module, it takes quite some time
// To skip it, call init() instead of restart()
SerialMon.println("Initializing modem...");
modem.restart();
// use modem.init() if you don't need the complete restart
// Unlock your SIM card with a PIN if needed
if (strlen(simPIN) && modem.getSimStatus() != 3) {
SerialMon.println("unlocking sim card...");
modem.simUnlock(simPIN);
}
// Configure the wake up source as timer wake up
esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
}
void loop() {
SerialMon.print("Connecting to APN: ");
SerialMon.println(apn);
if (!modem.gprsConnect(apn, gprsUser, gprsPass)) {
SerialMon.println(" fail");
}