Tasmota/tasmota/xsns_51_rdm6300.ino

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2019-08-19 09:54:58 +01:00
/*
xsns_51_rdm6300.ino - Support for RDM6300 NFC Tag Reader on Tasmota
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Copyright (C) 2019 Gerhard Mutz and Theo Arends
This program 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.
This program 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/>.
*/
#ifdef USE_RDM6300
#define XSNS_51 51
#define RDM6300_BAUDRATE 9600
#include <TasmotaSerial.h>
#define RDM_TIMEOUT 100
char rdm_uid_str[10];
// 2 seconds block time
#define RDM6300_BLOCK 2*10
uint8_t rdm_blcnt;
TasmotaSerial *RDM6300_Serial = nullptr;
void RDM6300_Init() {
if (pin[GPIO_RDM6300_RX] < 99) {
RDM6300_Serial = new TasmotaSerial(pin[GPIO_RDM6300_RX],-1,1);
if (RDM6300_Serial->begin(RDM6300_BAUDRATE)) {
if (RDM6300_Serial->hardwareSerial()) {
ClaimSerial();
}
}
}
rdm_blcnt=0;
}
// 14 bytes payload; // RFID DATA FRAME FORMAT: 1byte head (value: 2), 10byte data (2byte version + 8byte tag), 2byte checksum, 1byte tail (value: 3)
void RDM6300_ScanForTag() {
char rdm_buffer[14];
uint8_t rdm_index;
uint8_t rdm_array[6];
if (!RDM6300_Serial) return;
if (rdm_blcnt>0) {
rdm_blcnt--;
while (RDM6300_Serial->available()) RDM6300_Serial->read();
return;
}
if (RDM6300_Serial->available()) {
char c=RDM6300_Serial->read();
if (c!=2) return;
// head detected
// read rest of message 11 more bytes
rdm_index=0;
uint32_t cmillis=millis();
while (1) {
if (RDM6300_Serial->available()) {
char c=RDM6300_Serial->read();
if (c==3) {
// tail marker
break;
}
rdm_buffer[rdm_index++]=c;
if (rdm_index>13) {
// illegal message
return;
}
}
if ((millis()-cmillis)>RDM_TIMEOUT) {
// timeout
return;
}
}
// block for 2 seconds
rdm_blcnt=RDM6300_BLOCK;
// calc checksum,
rm6300_hstring_to_array(rdm_array,sizeof(rdm_array),rdm_buffer);
uint8_t accu=0;
for (uint8_t count=0;count<5;count++) {
accu^=rdm_array[count];
}
if (accu!=rdm_array[5]) {
// checksum error
return;
}
// copy 4 hex bytes
memcpy(rdm_uid_str,&rdm_buffer[2],8);
rdm_uid_str[9]=0;
ResponseTime_P(PSTR(",\"RDM6300\":{\"UID\":\"%s\"}}"), rdm_uid_str);
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MqttPublishPrefixTopic_P(TELE, PSTR(D_RSLT_SENSOR), Settings.flag.mqtt_sensor_retain);
/*
char command[24];
sprintf(command,"event RDM6300=%s",rdm_uid_str);
ExecuteCommand(command, SRC_RULE);
*/
}
}
uint8_t rm6300_hexnibble(char chr) {
uint8_t rVal = 0;
if (isdigit(chr)) {
rVal = chr - '0';
} else {
if (chr >= 'A' && chr <= 'F') rVal = chr + 10 - 'A';
if (chr >= 'a' && chr <= 'f') rVal = chr + 10 - 'a';
}
return rVal;
}
// convert hex string to int array
void rm6300_hstring_to_array(uint8_t array[], uint8_t len, char buffer[])
{
char *cp=buffer;
for (uint8_t i = 0; i < len; i++) {
uint8_t val = rm6300_hexnibble(*cp++) << 4;
array[i]= val | rm6300_hexnibble(*cp++);
}
}
#ifdef USE_WEBSERVER
const char HTTP_RDM6300[] PROGMEM =
"{s}RDM6300 " "UID" "{m}%s" "{e}";
void RDM6300_Show(void) {
if (!RDM6300_Serial) return;
if (!rdm_uid_str[0]) strcpy(rdm_uid_str,"????");
WSContentSend_PD(HTTP_RDM6300,rdm_uid_str);
}
#endif // USE_WEBSERVER
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xsns51(byte function)
{
bool result = false;
switch (function) {
case FUNC_INIT:
RDM6300_Init();
break;
case FUNC_EVERY_100_MSECOND:
RDM6300_ScanForTag();
break;
#ifdef USE_WEBSERVER
case FUNC_WEB_SENSOR:
RDM6300_Show();
break;
#endif // USE_WEBSERVER
}
return result;
}
#endif // USE_RDM6300