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Code Issues Releases Activity

MiEL HVAC: add a web config page for the Modbus RTU slave (#25018)

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Configure the Modbus RTU slave from the web UI instead of the console, the
same way MQTT is set up.

- a "Modbus RTU" button on the Configuration menu, next to "MQTT", built
  only with USE_MIEL_HVAC_MODBUS_SLAVE on ESP32
- the page has an "Enable Modbus RTU" checkbox plus address, baudrate and
  serial config, laid out like the MQTT and Logging pages. Save runs the
  HVACModbus* commands, which apply live, and returns to the Configuration
  menu. No reboot. A wrapped note appears when the MB Rx/Tx GPIOs are
  unassigned, without widening the page.
- a "Modbus" sticker on the main-page status line while the slave is running

No core files touched. The console commands are unchanged.
This commit is contained in:
Grzegorz
2026-09-08 09:10:00 +02:00
committed by GitHub
parent 213d4e43b6
commit cb836456a4
1 changed files with 103 additions and 0 deletions
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tasmota/tasmota_xdrv_driver/xdrv_44_miel_hvac.ino
+103
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@@ -51,6 +51,9 @@
* (RS485 DE/RE - omit for auto-direction transceivers)
* Commands HVACModbus 0|1, HVACModbusAddress 1..247, HVACModbusBaudrate 1200..115200,
* HVACModbusConfig 8N1|8E1|8O1|8N2|8E2|8O2 (persisted, applied live)
* Web a "Modbus RTU" button on the Configuration menu opens a page for the enable
* flag and the three parameters above (saved via the commands, applied live -
* no reboot). A "Modbus" status sticker shows while the slave runs
* Function 0x01/0x02 read coils / discrete inputs, 0x03/0x04 read holding / input
* codes registers, 0x05/0x0F/0x06/0x10 write coils / registers; CRC-16 checked,
* broadcast (address 0) accepted for writes
@@ -4561,6 +4564,91 @@ miel_hvac_web_getarg(void)
#undef MIEL_HVAC_WEB_GETARG
}
#if defined(USE_MIEL_HVAC_MODBUS_SLAVE) && defined(ESP32)
/*
* Modbus RTU slave configuration page, reached from a "Modbus RTU" button on
* the Configuration menu (the same place as "MQTT"). The enable flag and the
* three parameters are saved through the HVACModbus* console commands, which
* apply live - no reboot. While the slave is running a "Modbus" sticker is
* shown on the main-page status line.
*/
#define MIEL_HVAC_WEB_MB_PAGE "hvac_mb"
static const char miel_hvac_web_mb_form[] PROGMEM =
"<p><label><input id='mbe' type='checkbox'%s><b>Enable Modbus RTU</b></label></p>"
"<p><b>" D_ADDRESS "</b> (1)<br><input id='mba' placeholder='1' value='%d'></p>"
"<p><b>Baudrate</b><br><select id='mbr'>%s</select></p>"
"<p><b>Config</b><br><select id='mbc'>%s</select></p>";
static void
miel_hvac_web_mb_config(void)
{
static const uint32_t bauds[] =
{ 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 };
static const char cfgs[][4] =
{ "8N1", "8E1", "8O1", "8N2", "8E2", "8O2" };
String opts_baud;
String opts_cfg;
String cur_cfg;
uint32_t cur_baud;
unsigned int i;
if (!HttpCheckPriviledgedAccess())
return;
if (Webserver->hasArg(F("save")))
{
String cmnd = F(D_CMND_BACKLOG "0 ");
cmnd += F(D_CMND_MIEL_HVAC_MODBUS " ");
cmnd += Webserver->hasArg(F("mbe")) ? F("1") : F("0");
cmnd += AddWebCommand(PSTR(D_CMND_MIEL_HVAC_MODBUS_ADDRESS),
PSTR("mba"), PSTR("1"));
cmnd += AddWebCommand(PSTR(D_CMND_MIEL_HVAC_MODBUS_BAUDRATE),
PSTR("mbr"), PSTR("9600"));
cmnd += AddWebCommand(PSTR(D_CMND_MIEL_HVAC_MODBUS_CONFIG),
PSTR("mbc"), PSTR("8N1"));
ExecuteWebCommand((char *)cmnd.c_str());
HandleConfiguration(); /* applied live, back to the menu */
return;
}
miel_hvac_mb_settings_clamp();
cur_baud = (uint32_t)Settings->miel_hvac_mb_baudrate * 300;
cur_cfg = GetSerialConfig(Settings->miel_hvac_mb_sconfig);
for (i = 0; i < nitems(bauds); i++)
{
char o[32];
snprintf_P(o, sizeof(o), PSTR("<option%s>%u</option>"),
(bauds[i] == cur_baud) ? " selected" : "", bauds[i]);
opts_baud += o;
}
for (i = 0; i < nitems(cfgs); i++)
{
char o[36];
snprintf_P(o, sizeof(o), PSTR("<option%s>%s</option>"),
cur_cfg.equals(cfgs[i]) ? " selected" : "", cfgs[i]);
opts_cfg += o;
}
WSContentStart_P(PSTR("Modbus RTU"));
WSContentSendStyle();
WSContentSend_P(HTTP_FIELDSET_LEGEND, PSTR("Modbus RTU"));
WSContentSend_P(HTTP_FORM_GET_ACTION, PSTR(MIEL_HVAC_WEB_MB_PAGE));
WSContentSend_P(miel_hvac_web_mb_form,
Settings->sbflag1.miel_hvac_mb_enable ? PSTR(" checked") : PSTR(""),
Settings->miel_hvac_mb_address,
opts_baud.c_str(), opts_cfg.c_str());
if (!PinUsed(GPIO_MIEL_HVAC_MB_RX) || !PinUsed(GPIO_MIEL_HVAC_MB_TX))
WSContentSend_P(PSTR("<p style='width:320px;max-width:100%%'>"
"&#9888; The \"MiEl HVAC MB Rx\" and \"MiEl HVAC MB Tx\" GPIOs "
"are not assigned, so the slave cannot start.</p>"));
WSContentSend_P(HTTP_FORM_END);
WSContentSpaceButton(BUTTON_CONFIGURATION);
WSContentStop();
}
#endif /* USE_MIEL_HVAC_MODBUS_SLAVE && ESP32 */
#endif /* USE_WEBSERVER */
/*
@@ -4888,6 +4976,21 @@ bool Xdrv44(uint32_t function)
case FUNC_WEB_GET_ARG:
miel_hvac_web_getarg();
break;
#if defined(USE_MIEL_HVAC_MODBUS_SLAVE) && defined(ESP32)
case FUNC_WEB_ADD_BUTTON:
WSContentSend_P(HTTP_FORM_BUTTON, PSTR(MIEL_HVAC_WEB_MB_PAGE),
PSTR("Modbus RTU"));
break;
case FUNC_WEB_ADD_HANDLER:
WebServer_on(PSTR("/" MIEL_HVAC_WEB_MB_PAGE), miel_hvac_web_mb_config);
break;
#ifdef USE_WEB_STATUS_LINE
case FUNC_WEB_STATUS_RIGHT:
if (sc->sc_mb != nullptr)
WSContentStatusSticker(PSTR("Modbus"));
break;
#endif
#endif
#endif
case FUNC_AFTER_TELEPERIOD:
if (sc->sc_settings_set)