feat: Added AT basic commands

Webcalc.ino

@@ -16,15 +16,14 @@
 // Fingerprint for demo URL, expires on June 2, 2021, needs to be updated well before this date
 const uint8_t fingerprint[20] = {0xCF, 0xAC, 0xAE, 0x63, 0x39, 0xEA, 0x75, 0xDB, 0x28, 0xB9, 0xD9, 0x6D, 0x1B, 0xF3, 0x0F, 0xFE, 0xAF, 0x26, 0xEB, 0xE6};
 
-ESP8266WiFiMulti WiFiMulti;
+const char *VERSION = "webcalc-esp8266-0.1";
+bool echo = false; // Echo command received
 
 void setup() {
 
   Serial.begin(115200);
   // Serial.setDebugOutput(true);
 
-  Serial.println();
-  Serial.println();
   Serial.println();
 
   for (uint8_t t = 4; t > 0; t--) {
@@ -35,6 +34,8 @@ void setup() {
 
   WiFi.mode(WIFI_STA);
   WiFiMulti.addAP("SSID", "PASSWORD");
+
+  Serial.println("ready");
 }
 
 void loop() {

at_basic.cpp

@@ -4,21 +4,24 @@
 
 // AT: test startup
 void at() {
-    Serial.println("")
+    Serial.println("OK");
 }
 
 void at_rst() {
-
+    void(*reset)(void) = 0;
+    Serial.println("OK");
+    reset();
 }
 
 void at_gmr() {
-
+    extern char* VERSION;
+    Serial.println(VERSION);
 }
 
-void at_gslp() {
-
+void at_gslp(uint32_t t) {
+    sleep(t);
 }
 
-void ate() {
-
+void ate(bool e) {
+    extern bool echo = e;
 }

at_basic.h

@@ -0,0 +1,10 @@
+#ifndef _AT_BASIC_H
+#define _AT_BASIC_H
+
+void at(); // Echo OK
+void at_rst(); // Reset the module
+void at_gmr(); // Print software version
+void at_gslp(uint32_t t); // Sleeps x milliseconds
+void ate(bool e); // Enable/disable echo
+
+#endif