Permalink
9aa910d Nov 25, 2016
1 contributor

Users who have contributed to this file

74 lines (65 sloc) 1.62 KB
/*
* This utility allows you to cross-connect two serial channels
* using any Arduino-compatible hardware.
*
* This is usefull for:
* Checking wiring
* Converting baud rate
* Sending AT commands
* etc.
*
* Popular AT command sets:
* ESP8266: http://www.espressif.com/sites/default/files/4a-esp8266_at_instruction_set_en_v1.5.4_0.pdf
* SIM800L: https://www.itead.cc/wiki/images/6/6f/SIM800_Series_AT_Command_Manual_V1.05.pdf
* XBee: https://cdn.sparkfun.com/learn/materials/29/22AT%20Commands.pdf
*/
#define ser1 Serial
#if defined(HAVE_HWSERIAL1)
#define ser2 Serial1
#else
#warning Using Software Serial!
#include <SoftwareSerial.h>
SoftwareSerial SerialSw(2, 3);
#define ser2 SerialSw
#endif
void setup() {
ser1.begin(9600);
while (!ser1);
delay(10);
ser2.begin(9600);
delay(10);
}
void loop() {
if (ser1.available()) {
int c = ser1.read();
if (!parseCommands(c)) {
ser2.write(c);
}
}
if (ser2.available()) {
ser1.write(ser2.read());
}
}
/*
* Special commands:
* !speed=1000000 (after ESP8266 command: AT+UART_CUR=1000000,8,1,0,0)
*/
char cmd_prefix[] = "!speed=";
uint8_t cmd_prefix_idx = 0;
bool parseCommands(int c) {
if (c == cmd_prefix[cmd_prefix_idx]) {
cmd_prefix_idx++;
if (cmd_prefix_idx >= sizeof(cmd_prefix) - 1) {
String cmd = ser1.readStringUntil('\n');
long baud = cmd.toInt();
ser1.print("Speed:"); ser1.println(baud);
ser2.begin(baud);
cmd_prefix_idx = 0;
}
return true;
} else if (cmd_prefix_idx > 0) {
ser2.write(cmd_prefix, cmd_prefix_idx);
cmd_prefix_idx = 0;
}
return false;
}