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Tasmota/tasmota/xdrv_40_telegram.ino

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/*
xdrv_40_telegram.ino - telegram for Tasmota
Copyright (C) 2021 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_TELEGRAM
/*********************************************************************************************\
* Telegram bot
*
* Supported commands:
* TmToken <token> - Add your BotFather created bot token (default none)
* TmChatId <chat_id> - Add your BotFather created bot chat id (default none)
* TmPoll <seconds> - Telegram receive poll time (default 10 seconds)
* TmState 0 - Disable telegram sending (default)
* TmState 1 - Enable telegram sending (needs valid TmChatId)
* TmState 2 - Disable telegram listener (default)
* TmState 3 - Enable telegram listener
* TmState 4 - Disable telegram response echo (default)
* TmState 5 - Enable telegram response echo
* TmSend <data> - If telegram sending is enabled AND a chat id is present then send data
*
* Tested with defines
* #define USE_TELEGRAM // Support for Telegram protocol
* #define USE_TELEGRAM_FINGERPRINT "\xB2\x72\x47\xA6\x69\x8C\x3C\x69\xF9\x58\x6C\xF3\x60\x02\xFB\x83\xFA\x8B\x1F\x23" // Telegram api.telegram.org TLS public key fingerpring
\*********************************************************************************************/
#define XDRV_40 40
#ifndef TELEGRAM_LOOP_WAIT
#define TELEGRAM_LOOP_WAIT 10 // Seconds
#endif
#define TELEGRAM_SEND_RETRY 4 // Retries
#define TELEGRAM_MAX_MESSAGES 2
#ifdef USE_MQTT_TLS_CA_CERT
static const uint32_t tls_rx_size = 2048; // since Telegram CA is bigger than 1024 bytes, we need to increase rx buffer
static const uint32_t tls_tx_size = 1024;
#else
static const uint32_t tls_rx_size = 1024;
static const uint32_t tls_tx_size = 1024;
#endif
#include "WiFiClientSecureLightBearSSL.h"
BearSSL::WiFiClientSecure_light *telegramClient = nullptr;
static const uint8_t Telegram_Fingerprint[] PROGMEM = USE_TELEGRAM_FINGERPRINT;
typedef struct {
String text;
String chat_id;
// String from_first_name;
// String from_last_name;
// uint32_t from_id = 0;
uint32_t update_id = 0;
} TelegramMessage;
struct {
TelegramMessage message[TELEGRAM_MAX_MESSAGES];
uint32_t next_update_id = 0;
uint8_t message_count = 0; // Amount of messages read per time
uint8_t state = 0;
uint8_t index = 0;
uint8_t retry = 0;
uint8_t poll = TELEGRAM_LOOP_WAIT;
uint8_t wait = 0;
bool recv_busy = false;
bool skip = true; // Skip first telegram if restarted
} Telegram;
bool TelegramInit(void) {
bool init_done = false;
if (strlen(SettingsText(SET_TELEGRAM_TOKEN))) {
if (!telegramClient) {
telegramClient = new BearSSL::WiFiClientSecure_light(tls_rx_size, tls_tx_size);
#ifdef USE_MQTT_TLS_CA_CERT
telegramClient->setTrustAnchor(&GoDaddyCAG2_TA, 1);
#else
telegramClient->setPubKeyFingerprint(Telegram_Fingerprint, Telegram_Fingerprint, false); // check server fingerprint
#endif
Telegram.message_count = 0; // Number of received messages
Telegram.next_update_id = 0; // Code of last read Message
Telegram.message[0].text = "";
AddLog(LOG_LEVEL_INFO, PSTR("TGM: Started"));
}
init_done = true;
}
return init_done;
}
String TelegramConnectToTelegram(const String &command) {
// AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("TGM: Cmnd '%s'"), command.c_str());
if (!TelegramInit()) { return ""; }
String host = F("api.telegram.org");
String response = "";
uint32_t tls_connect_time = millis();
if (telegramClient->connect(host.c_str(), 443)) {
// AddLog(LOG_LEVEL_DEBUG, PSTR("TGM: Connected in %d ms, max ThunkStack used %d"), millis() - tls_connect_time, telegramClient->getMaxThunkStackUse());
// telegramClient->println("GET /"+command); // Fails after 20210621
String request = "GET /" + command + " HTTP/1.1\r\nHost: " + host + "\r\nConnection: close\r\n\r\n";
telegramClient->print(request);
/*
Response before 20210621:
{"ok":true,"result":[]}
Response after 20210621:
HTTP/1.1 200 OK
Server: nginx/1.18.0
Date: Thu, 24 Jun 2021 15:26:20 GMT
Content-Type: application/json
Content-Length: 23
Connection: close
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, POST, OPTIONS
Access-Control-Expose-Headers: Content-Length,Content-Type,Date,Server,Connection
{"ok":true,"result":[]}
*/
char c;
bool available = false;
uint32_t now = millis();
while (!available && (millis() -now < 1500)) {
while (telegramClient->available()) {
c = telegramClient->read();
if (c == '{') {
available = true; // Skip headers (+-400 bytes) and start response at first JSON
}
if (available) {
response += c;
if (response.length() > 800) { // Allow up to two messages
break;
}
}
}
}
telegramClient->stop();
}
return response;
}
void TelegramGetUpdates(uint32_t offset) {
AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("TGM: getUpdates"));
if (!TelegramInit()) { return; }
String _token = SettingsText(SET_TELEGRAM_TOKEN);
String command = "bot" + _token + "/getUpdates?offset=" + String(offset);
String response = TelegramConnectToTelegram(command); //recieve reply from telegram.org
// {"ok":true,"result":[]}
// or
// {"ok":true,"result":[
// {"update_id":973125394,
// "message":{"message_id":25,
// "from":{"id":139920293,"is_bot":false,"first_name":"Theo","last_name":"Arends","username":"tjatja","language_code":"nl"},
// "chat":{"id":139920293,"first_name":"Theo","last_name":"Arends","username":"tjatja","type":"private"},
// "date":1591877503,
// "text":"M1"
// }
// },
// {"update_id":973125395,
// "message":{"message_id":26,
// "from":{"id":139920293,"is_bot":false,"first_name":"Theo","last_name":"Arends","username":"tjatja","language_code":"nl"},
// "chat":{"id":139920293,"first_name":"Theo","last_name":"Arends","username":"tjatja","type":"private"},
// "date":1591877508,
// "text":"M2"
// }
// }
// ]}
// or
// {"ok":true,"result":[
// {"update_id":973125396,
// "message":{"message_id":29,
// "from":{"id":139920293,"is_bot":false,"first_name":"Theo","last_name":"Arends","username":"tjatja","language_code":"nl"},
// "chat":{"id":139920293,"first_name":"Theo","last_name":"Arends","username":"tjatja","type":"private"},
// "date":1591879753,
// "text":"/power toggle",
// "entities":[{"offset":0,"length":6,"type":"bot_command"}]
// }
// }
// ]}
// or
// {"ok":true,"result":[
// {"update_id":14354460,
// "message":{"message_id":164,
// "from":{"id":139920293,"is_bot":false,"first_name":"Theo","last_name":"Arends","username":"tjatja","language_code":"nl"},
// "chat":{"id":139920293,"first_name":"Theo","last_name":"Arends","username":"tjatja","type":"private"},
// "date":1602428727,
// "text":"Status 1"
// }
// },
// {"update_id":14354461,
// "message":{"message_id":165,
// "from":{"id":139920293,"is_bot":false,"first_name":"Theo","last_name":"Arends","username":"tjatja","language_code":"nl"},
// "chat":{"id":139920293,"first_name":"Theo","last_name":"Arends","username":"tjatja","type":"private"},
// "date":1602428731,
// "text":"Status 2"
// }
// }
// ]}
AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("TGM: Response '%s'"), response.c_str());
JsonParser parser((char*)response.c_str());
JsonParserObject root = parser.getRootObject();
if (root) {
// AddLog(LOG_LEVEL_DEBUG, PSTR("TGM: Sent Update request messages up to %s"), offset.c_str());
JsonParserArray arr = root[PSTR("result")];
uint32_t max_updates = arr.size();
// if (max_updates > TELEGRAM_MAX_MESSAGES) { max_updates = TELEGRAM_MAX_MESSAGES; }
if (max_updates > 1) { max_updates = 1; } // Cannot handle more than one for now
Telegram.message_count = 0; // Returns how many messages are in the array
if (max_updates) {
for (uint32_t i = 0; i < max_updates; i++) {
Telegram.message[i].text = ""; // Reset command
JsonParserObject result = arr[i].getObject();
if (result) {
// {"update_id":14354450,
// "message":{"message_id":141,
// "from":{"id":139920293,"is_bot":false,"first_name":"Theo","last_name":"Arends","username":"tjatja","language_code":"nl"},
// "chat":{"id":139920293,"first_name":"Theo","last_name":"Arends","username":"tjatja","type":"private"},
// "date":1602346120,
// "text":"Status 1"}}
Telegram.message_count++; // Returns how many messages are in the array
Telegram.message[i].update_id = result["update_id"].getUInt();
// Telegram.message[i].from_id = result["message"].getObject()["from"].getObject()["id"].getUInt();
// Telegram.message[i].from_first_name = result["message"].getObject()["from"].getObject()["first_name"].getStr();
// Telegram.message[i].from_last_name = result["message"].getObject()["from"].getObject()["last_name"].getStr();
Telegram.message[i].chat_id = result["message"].getObject()["chat"].getObject()["id"].getStr();
Telegram.message[i].text = result["message"].getObject()["text"].getStr();
}
Telegram.next_update_id = Telegram.message[i].update_id +1; // Write id of last read message
AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("TGM: Parsed update_id %d, chat_id %s, text \"%s\""), Telegram.message[i].update_id, Telegram.message[i].chat_id.c_str(), Telegram.message[i].text.c_str());
}
} else {
// AddLog(LOG_LEVEL_DEBUG, PSTR("TGM: No new messages"));
}
} else {
// AddLog(LOG_LEVEL_DEBUG, PSTR("TGM: Failed to update"));
}
}
bool TelegramSendMessage(const String &chat_id, const String &text) {
AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("TGM: sendMessage"));
if (!TelegramInit()) { return false; }
bool sent = false;
if (text != "") {
String _token = SettingsText(SET_TELEGRAM_TOKEN);
String command = "bot" + _token + "/sendMessage?chat_id=" + chat_id + "&text=" + UrlEncode(text);
String response = TelegramConnectToTelegram(command);
// AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("TGM: Response %s"), response.c_str());
if (response.startsWith("{\"ok\":true")) {
// AddLog(LOG_LEVEL_DEBUG, PSTR("TGM: Message sent"));
sent = true;
}
}
return sent;
}
/*
void TelegramSendGetMe(void) {
AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("TGM: getMe"));
if (!TelegramInit()) { return; }
String _token = SettingsText(SET_TELEGRAM_TOKEN);
String command = "bot" + _token + "/getMe";
String response = TelegramConnectToTelegram(command);
// {"ok":true,"result":{"id":1179906608,"is_bot":true,"first_name":"Tasmota","username":"tasmota_bot","can_join_groups":true,"can_read_all_group_messages":false,"supports_inline_queries":false}}
// AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("TGM: Response %s"), response.c_str());
}
*/
String TelegramExecuteCommand(const char *svalue) {
String response = "";
uint32_t curridx = TasmotaGlobal.log_buffer_pointer;
TasmotaGlobal.templog_level = LOG_LEVEL_INFO;
ExecuteCommand(svalue, SRC_CHAT);
response = F("{");
bool cflg = false;
uint32_t index = curridx;
char* line;
size_t len;
while (GetLog(TasmotaGlobal.templog_level, &index, &line, &len)) {
// [14:49:36.123 MQTT: stat/wemos5/RESULT = {"POWER":"OFF"}] > [{"POWER":"OFF"}]
char* JSON = (char*)memchr(line, '{', len);
if (JSON) { // Is it a JSON message (and not only [15:26:08 MQT: stat/wemos5/POWER = O])
if (cflg) { response += F(","); } // Add a comma
// size_t JSONlen = len - (JSON - line);
// response.concat(JSON +1, JSONlen -3); // Add terminating '\0' - Not supported on ESP32
len -= 2; // Skip last '}'
char save_log_char = line[len];
line[len] = '\0'; // Add terminating \'0'
response.concat(JSON +1); // Skip first '{'
line[len] = save_log_char;
cflg = true;
}
}
response += F("}");
TasmotaGlobal.templog_level = 0;
return response;
}
void TelegramLoop(void) {
if (!TasmotaGlobal.global_state.network_down && (Settings->sbflag1.telegram_recv_enable || Settings->sbflag1.telegram_echo_enable)) {
switch (Telegram.state) {
case 0:
TelegramInit();
Telegram.state++;
break;
case 1:
TelegramGetUpdates(Telegram.next_update_id); // Launch API GetUpdates up to xxx message
Telegram.index = 0;
Telegram.retry = TELEGRAM_SEND_RETRY;
Telegram.state++;
break;
case 2:
if (Settings->sbflag1.telegram_echo_enable) {
if (Telegram.retry && (Telegram.index < Telegram.message_count)) {
if (TelegramSendMessage(Telegram.message[Telegram.index].chat_id, Telegram.message[Telegram.index].text)) {
Telegram.index++;
Telegram.retry = TELEGRAM_SEND_RETRY;
} else {
Telegram.retry--;
}
} else {
Telegram.message_count = 0; // All messages have been replied - reset new messages
Telegram.wait = Telegram.poll;
Telegram.state++;
}
} else {
if (Telegram.skip) { // Skip first update after restart as it may be a restart (again)
Telegram.skip = false;
} else {
if (Telegram.message_count && (Telegram.message[Telegram.index].text.length() > 0)) {
String logging = TelegramExecuteCommand(Telegram.message[Telegram.index].text.c_str());
if (logging.length() > 0) {
TelegramSendMessage(Telegram.message[Telegram.index].chat_id, logging);
}
}
}
Telegram.message_count = 0; // All messages have been replied - reset new messages
Telegram.wait = Telegram.poll;
Telegram.state++;
}
break;
case 3:
if (Telegram.wait) {
Telegram.wait--;
} else {
Telegram.state = 1;
}
}
}
}
/*********************************************************************************************\
* Commands
\*********************************************************************************************/
#define D_CMND_TMSTATE "State"
#define D_CMND_TMPOLL "Poll"
#define D_CMND_TMSEND "Send"
#define D_CMND_TMTOKEN "Token"
#define D_CMND_TMCHATID "ChatId"
const char kTelegramCommands[] PROGMEM = "Tm|" // Prefix
D_CMND_TMSTATE "|" D_CMND_TMPOLL "|" D_CMND_TMTOKEN "|" D_CMND_TMCHATID "|" D_CMND_TMSEND;
void (* const TelegramCommand[])(void) PROGMEM = {
&CmndTmState, &CmndTmPoll, &CmndTmToken, &CmndTmChatId, &CmndTmSend };
void CmndTmState(void) {
if (XdrvMailbox.data_len > 0) {
if ((XdrvMailbox.payload >= 0) && (XdrvMailbox.payload <= 6)) {
switch (XdrvMailbox.payload) {
case 0: // Off
case 1: // On
Settings->sbflag1.telegram_send_enable = XdrvMailbox.payload &1;
break;
case 2: // Off
case 3: // On
Settings->sbflag1.telegram_recv_enable = XdrvMailbox.payload &1;
break;
case 4: // Off
case 5: // On
Settings->sbflag1.telegram_echo_enable = XdrvMailbox.payload &1;
break;
}
}
}
Response_P(PSTR("{\"%s\":{\"Send\":\"%s\",\"Receive\":\"%s\",\"Echo\":\"%s\"}}"),
XdrvMailbox.command,
GetStateText(Settings->sbflag1.telegram_send_enable),
GetStateText(Settings->sbflag1.telegram_recv_enable),
GetStateText(Settings->sbflag1.telegram_echo_enable));
}
void CmndTmPoll(void) {
if ((XdrvMailbox.payload >= 4) && (XdrvMailbox.payload <= 300)) {
Telegram.poll = XdrvMailbox.payload;
if (Telegram.poll < Telegram.wait) {
Telegram.wait = Telegram.poll;
}
}
ResponseCmndNumber(Telegram.poll);
}
void CmndTmToken(void) {
if (XdrvMailbox.data_len > 0) {
SettingsUpdateText(SET_TELEGRAM_TOKEN, ('"' == XdrvMailbox.data[0]) ? "" : XdrvMailbox.data);
}
ResponseCmndChar(SettingsText(SET_TELEGRAM_TOKEN));
}
void CmndTmChatId(void) {
if (XdrvMailbox.data_len > 0) {
SettingsUpdateText(SET_TELEGRAM_CHATID, ('"' == XdrvMailbox.data[0]) ? "" : XdrvMailbox.data);
}
ResponseCmndChar(SettingsText(SET_TELEGRAM_CHATID));
}
void CmndTmSend(void) {
if (!Settings->sbflag1.telegram_send_enable || !strlen(SettingsText(SET_TELEGRAM_CHATID))) {
ResponseCmndFailed();
return;
}
if (XdrvMailbox.data_len > 0) {
String message = XdrvMailbox.data;
String chat_id = SettingsText(SET_TELEGRAM_CHATID);
if (!TelegramSendMessage(chat_id, message)) {
ResponseCmndFailed();
return;
}
}
ResponseCmndDone();
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xdrv40(uint8_t function)
{
bool result = false;
switch (function) {
case FUNC_EVERY_SECOND:
TelegramLoop();
break;
case FUNC_COMMAND:
result = DecodeCommand(kTelegramCommands, TelegramCommand);
break;
}
return result;
}
#endif // USE_TELEGRAM
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