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ZgatewayBT.ino
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ZgatewayBT.ino
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/*
OpenMQTTGateway - ESP8266 or Arduino program for home automation
Act as a wifi or ethernet gateway between your 433mhz/infrared IR signal/BLE and a MQTT broker
Send and receiving command by MQTT
This gateway enables to:
- publish MQTT data to a different topic related to BLE devices rssi signal
Copyright: (c)Florian ROBERT
This file is part of OpenMQTTGateway.
OpenMQTTGateway is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenMQTTGateway is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Thanks to wolass https://github.com/wolass for suggesting me HM 10 and dinosd https://github.com/dinosd/BLE_PROXIMITY for inspiring me how to implement the gateway
*/
#ifdef ZgatewayBT
#include <SoftwareSerial.h>
#define STRING_MSG "OK+DISC:"
#define RESPONSE_MSG "OK+DISIS"
#define RESP_END_MSG "OK+DISCE"
#define SETUP_MSG "OK+RESET"
SoftwareSerial softserial(BT_RX, BT_TX);
String returnedString = "";
unsigned long timebt = 0;
// this struct define which parts of the hexadecimal chain we extract and what to do with these parts
struct decompose d[6] = {{"mac",16,12,true},{"typ",28,2,false},{"rsi",30,2,false},{"rdl",32,2,false},{"sty",44,4,true},{"rda",34,60,false}};
void setupBT() {
softserial.begin(9600);
softserial.print(F("AT+ROLE1"));
delay(100);
softserial.print(F("AT+IMME1"));
delay(100);
softserial.print(F("AT+RESET"));
delay(100);
}
#ifdef ZgatewayBT_v6xx
#define QUESTION_MSG "AT+DISA?"
boolean BTtoMQTT() {
//extract serial data from module in hexa format
while (softserial.available() > 0) {
int a = softserial.read();
if (a < 16) {
returnedString = returnedString + "0";
}
returnedString = returnedString + String(a,HEX);
}
if (millis() > (timebt + TimeBtw_Read)) {//retriving data
timebt = millis();
#ifdef ESP8266
yield();
#endif
if (returnedString != "") {
size_t pos = 0;
while ((pos = returnedString.lastIndexOf(delimiter)) != -1) {
#ifdef ESP8266
yield();
#endif
String token = returnedString.substring(pos);
returnedString.remove(pos,returnedString.length() );
char token_char[token.length()+1];
token.toCharArray(token_char, token.length()+1);
for(int i =0; i<6;i++)
{
extract_char(token_char,d[i].extract,d[i].start, d[i].len ,d[i].reverse, false);
if (i == 3) d[5].len = (int)strtol(d[i].extract, NULL, 16) * 2; // extracting the length of the rest data
}
if((strlen(d[0].extract)) == 12) // if a mac adress is detected we publish it
{
strupp(d[0].extract);
String mactopic(d[0].extract);
trc(mactopic);
mactopic = subjectBTtoMQTT + mactopic;
int rssi = (int)strtol(d[2].extract, NULL, 16) - 256;
char val[12];
sprintf(val, "%d", rssi);
client.publish((char *)mactopic.c_str(),val);
if (strcmp(d[4].extract, "fe95") == 0)
boolean result = process_miflora_data(d[5].extract,d[0].extract);
return true;
}
}
returnedString = ""; //init data string
return false;
}
softserial.print(F(QUESTION_MSG));
return false;
}else{
return false;
}
}
void strupp(char* beg)
{
while (*beg = toupper(*beg))
++beg;
}
boolean process_miflora_data(char * rest_data, char * mac_adress){
char tmp_rest_data_length[1];
memcpy( tmp_rest_data_length, &rest_data[51], 1 );
int data_length = ((int)strtol(tmp_rest_data_length, NULL, 16)*2)+1;
char rev_data[data_length];
char data[data_length];
memcpy( rev_data, &rest_data[52], data_length );
rev_data[data_length] = '\0';
// reverse data order
revert_hex_data(rev_data, data, data_length);
int value = strtol(data, NULL, 16);
char val[12];
sprintf(val, "%d", value);
String mactopic(mac_adress);
mactopic = subjectBTtoMQTT + mactopic;
// following the value of digit 47 we determine the type of data we get from the sensor
switch (rest_data[47]) {
case '9' :
mactopic = mactopic + "/" + "fer";
break;
case '4' :
mactopic = mactopic + "/" + "tem";
dtostrf(value/10,4,1,val); // override temperature value in case we have, indeed temp has to be divided by 10
break;
case '7' :
mactopic = mactopic + "/" + "lux";
break;
case '8' :
mactopic = mactopic + "/" + "hum";
break;
default:
trc("can't read values");
return false;
}
client.publish((char *)mactopic.c_str(),val);;
trc(String(val));
return true;
}
#endif
#ifndef ZgatewayBT_v6xx
#define QUESTION_MSG "AT+DISI?"
boolean BTtoMQTT() {
while (softserial.available() > 0) {
#ifdef ESP8266
yield();
#endif
String discResult = softserial.readString();
if (discResult.indexOf(STRING_MSG)>=0){
discResult.replace(RESPONSE_MSG,"");
discResult.replace(RESP_END_MSG,"");
float device_number = discResult.length()/78.0;
if (device_number == (int)device_number){ // to avoid publishing partial values we detect if the serial data has been fully read = a multiple of 78
trc(F("Sending BT data to MQTT"));
#ifdef ESP8266
yield();
#endif
for (int i=0;i<(int)device_number;i++){
String onedevice = discResult.substring(0,78);
onedevice.replace(STRING_MSG,"");
String mac = onedevice.substring(53,65);
String rssi = onedevice.substring(66,70);
String mactopic = subjectBTtoMQTT + mac;
trc(mactopic + " " + rssi);
client.publish((char *)mactopic.c_str(),(char *)rssi.c_str());
discResult = discResult.substring(78);
}
return true;
}
}
if (discResult.indexOf(SETUP_MSG)>=0)
{
trc(F("Connection OK to HM-10"));
}
}
if (millis() > (timebt + TimeBtw_Read)) {//retriving value of adresses and rssi
timebt = millis();
#ifdef ESP8266
yield();
#endif
softserial.print(F(QUESTION_MSG));
}
return false;
}
#endif
#endif