added CRC check, README update, bug fixes,

include/config_template.h

@@ -0,0 +1,67 @@
+#ifndef __CONFIG_H__
+#define __CONFIG_H__
+
+#include <vector>
+
+#define DEBUG 1 // set to 1 for detailed logging at UART
+#define ESP_NAME "esp-multical21"   // for dns resolving
+#define MQTT_PREFIX "watermeter/0"  // mqtt prefix topic
+#define MQTT_total "/total"
+#define MQTT_target "/target"
+#define MQTT_ftemp "/flowtemp"
+#define MQTT_atemp "/ambienttemp"
+#define MQTT_info "/infocode"
+
+// ask your water supplier for your personal encryption key 
+#define ENCRYPTION_KEY      0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF
+// serial number is printed on your multical21
+#define SERIAL_NUMBER       0x12, 0x34, 0x56, 0x78
+
+// WIFI configuration, supports more than one WIFI, first found first served
+// if you dont use MQTT, leave broker/user/pass empty ("")
+// if you dont need user/pass for MQTT, leave it empty ("")
+struct CREDENTIAL {
+    char const* ssid;           // Wifi ssid
+    char const* password;	      // Wifi password
+    char const* mqtt_broker;		// MQTT broker ip address
+    char const* mqtt_username;	// MQTT username
+    char const* mqtt_password;	// MQTT password
+};
+
+// more than one wifi credentials are supported, upper one wins
+// "ssid", "wifi_passphrase", "mqtt_broker", "mqtt_username", "mqtt_password"
+std::vector<CREDENTIAL> const credentials = {
+     { "ssid1", "********", "", "", ""}   // no MQTT
+   , { "ssid2", "********", "10.14.0.1", "", ""} // MQTT without auth
+   , { "ssid3", "********", "10.0.0.111", "mqttuser", "mqtt1234"}  // MQTT with auth
+};
+
+#if defined(ESP8266)
+// Attach CC1101 pins to ESP8266 SPI pins
+// VCC   => 3V3
+// GND   => GND
+// CSN   => D8
+// MOSI  => D7
+// MISO  => D6
+// SCK   => D5
+// GD0   => D2  A valid interrupt pin for your platform (defined below this)
+// GD2   => not connected 
+  #define CC1101_GDO0         D2   // GDO0 input interrupt pin
+  #define PIN_LED_BUILTIN     D4
+#elif defined(ESP32)
+// Attach CC1101 pins to ESP32 SPI pins
+// VCC   => 3V3
+// GND   => GND
+// CSN   => 4
+// MOSI  => 23
+// MISO  => 19
+// SCK   => 18
+// GD0   => 32  any valid interrupt pin for your platform will do
+// GD2   => not connected 
+
+// attach CC1101 pins to ESP32 SPI pins
+
+  #define CC1101_GDO0          32
+  #define PIN_LED_BUILTIN      2
+#endif
+#endif // __CONFIG_H__