Tasmota can easily be extended by developers using provided function pointers as callback Ids. This document lists the available callback function Ids. Read Sensor API for more information.
Callback availability can be checked by searching for either XdrvCall, XsnsCall, XdspCall, XnrgCall and XlgtCall.
The following table lists Callback Ids and their availability for a Driver, Sensor or Energy service.
| Callback Id | Bool | xdrv | xsns | xnrg | xlgt | Description |
|---|---|---|---|---|---|---|
| FUNC_SETTINGS_OVERRIDE | x | Override start-up settings | ||||
| FUNC_PIN_STATE | x | 1 | 2 | At GPIO configuration | ||
| FUNC_I2C_INIT | x | Immediately after I2C init | ||||
| FUNC_MODULE_INIT | x | 3 | 1 | 2 | Init module specific parameters | |
| FUNC_PRE_INIT | 1 | 3 | 2 | Once GPIO have been established | ||
| FUNC_INIT | 1 | 3 | 2 | At end of initialisation | ||
| FUNC_LOOP | 1 | 2 | In main loop | |||
| FUNC_SLEEP_LOOP | 1 | 2 | In main loop during sleep | |||
| FUNC_EVERY_50_MSECOND | 1 | 2 | In main loop | |||
| FUNC_EVERY_100_MSECOND | 1 | 2 | In main loop | |||
| FUNC_EVERY_200_MSECOND | x | In main loop | ||||
| FUNC_EVERY_250_MSECOND | 1 | 3 | 2 | In main loop | ||
| FUNC_EVERY_SECOND | 1 | 2 | In main loop | |||
| FUNC_SAVE_SETTINGS | 2 | 1 | Just before saving settings | |||
| FUNC_SAVE_AT_MIDNIGHT | x | At midnight | ||||
| FUNC_SAVE_BEFORE_RESTART | 2 | 1 | Just before a planned restart | |||
| FUNC_AFTER_TELEPERIOD | 2 | 1 | At end of teleperiod | |||
| FUNC_JSON_APPEND | 2 | 1 | 3 | Extend teleperiod JSON text | ||
| FUNC_WEB_SENSOR | 2 | 1 | 3 | Add sensor data to web GUI | ||
| FUNC_WEB_COL_SENSOR | 2 | 1 | 3 | Add sensor data to web GUI using columns | ||
| FUNC_COMMAND | x | 1 | 2 | 3 | 4 | When a command is not recognized |
| FUNC_COMMAND_DRIVER | x | x | When command Driver<id> is executed | |||
| FUNC_COMMAND_SENSOR | x | x | When command Sensor<id> is executed | |||
| FUNC_MQTT_SUBSCRIBE | x | At end of MQTT subscriptions | ||||
| FUNC_MQTT_INIT | x | Once at end of MQTT connection | ||||
| FUNC_MQTT_DATA | x | x | Before decoding command | |||
| FUNC_SET_POWER | 1 | 2 | Before setting relays | |||
| FUNC_SET_DEVICE_POWER | x | x | Set relay | |||
| FUNC_SHOW_SENSOR | x | When FUNC_JSON_APPEND completes | ||||
| FUNC_ANY_KEY | x | |||||
| FUNC_LED_LINK | x | SetLedLink (On ESP32 only). XdrvMailbox.index holds state | ||||
| FUNC_ENERGY_EVERY_SECOND | x | |||||
| FUNC_ENERGY_RESET | x | |||||
| FUNC_RULES_PROCESS | x | x | Process specific rule | |||
| FUNC_TELEPERIOD_RULES_PROCESS | x | x | Process specific rule as teleperiod | |||
| FUNC_SERIAL | x | 1 | 2 | 3 | Process serial data | |
| FUNC_FREE_MEM | x | Show free memory for debugging | ||||
| FUNC_BUTTON_PRESSED | x | x | When a button is pressed | |||
| FUNC_BUTTON_MULTI_PRESSED | x | x | When a button is pressed multiple times | |||
| FUNC_WEB_ADD_BUTTON | 1 | 2 | Add a Configuration Button to GUI | |||
| FUNC_WEB_ADD_MAIN_BUTTON | 1 | 2 | Add a main button to GUI | |||
| FUNC_WEB_ADD_CONSOLE_BUTTON | 1 | 2 | Add a Consoles Button to GUI | |||
| FUNC_WEB_ADD_MANAGEMENT_BUTTON | x | Add a Management Button to GUI | ||||
| FUNC_WEB_ADD_HANDLER | 1 | 2 | Add a webserver handler | |||
| FUNC_WEB_GET_ARG | 2 | 1 | 3 | Get webserver setting arguments | ||
| FUNC_SET_CHANNELS | 2 | 1 | ||||
| FUNC_SET_SCHEME | x | |||||
| FUNC_HOTPLUG_SCAN | x | |||||
| FUNC_TIME_SYNCED | x | Report time is synced | ||||
| FUNC_DEVICE_GROUP_ITEM | x | |||||
| FUNC_NETWORK_UP | 1 | 2 | 3 | 4 | Wifi or ETH network just went up (received even if webserver is not enabled) | |
| FUNC_NETWORK_DOWN | 1 | 2 | 3 | 4 | Wifi or ETH network just went down (received even if webserver is not enabled) |
The numbers represent the sequence of execution
The following table lists all Callback Ids for a Display service.
| Callback Id | Bool | Description |
|---|---|---|
| FUNC_DISPLAY_INIT_DRIVER | ||
| FUNC_DISPLAY_INIT | ||
| FUNC_DISPLAY_EVERY_50_MSECOND | ||
| FUNC_DISPLAY_EVERY_SECOND | ||
| FUNC_DISPLAY_MODEL | x | |
| FUNC_DISPLAY_MODE | ||
| FUNC_DISPLAY_POWER | ||
| FUNC_DISPLAY_CLEAR | ||
| FUNC_DISPLAY_DRAW_FRAME | ||
| FUNC_DISPLAY_DRAW_HLINE | ||
| FUNC_DISPLAY_DRAW_VLINE | ||
| FUNC_DISPLAY_DRAW_LINE | ||
| FUNC_DISPLAY_DRAW_CIRCLE | ||
| FUNC_DISPLAY_FILL_CIRCLE | ||
| FUNC_DISPLAY_DRAW_RECTANGLE | ||
| FUNC_DISPLAY_FILL_RECTANGLE | ||
| FUNC_DISPLAY_TEXT_SIZE | ||
| FUNC_DISPLAY_FONT_SIZE | ||
| FUNC_DISPLAY_ROTATION | ||
| FUNC_DISPLAY_DRAW_STRING | ||
| FUNC_DISPLAY_ONOFF |
The following list shows a typical callback init sequence
CFG: Loaded from flash at FB, Count 1581
xdrv - FUNC_SETTINGS_OVERRIDE
xdrv - FUNC_PIN_STATE
xsns - FUNC_PIN_STATE
xsns - FUNC_MODULE_INIT
xdrv - FUNC_MODULE_INIT
xlgt - FUNC_MODULE_INIT
xdrv - FUNC_PRE_INIT
xnrg - FUNC_PRE_INIT
xsns - FUNC_PRE_INIT
SRC: Restart
xdrv - FUNC_SET_POWER
xsns - FUNC_SET_POWER
xlgt - FUNC_SET_CHANNELS
xdrv - FUNC_SET_DEVICE_POWER
Project tasmota Wemos 2 Version 7.0.0.3(tasmota)-STAGE
xdrv - FUNC_INIT
xsns - FUNC_INIT
I2C: ADS1115 found at 0x48
xdrv - FUNC_LOOP
xsns - FUNC_LOOP
xdrv - FUNC_EVERY_50_MSECOND
xlgt - FUNC_SET_CHANNELS
xsns - FUNC_EVERY_50_MSECOND
xdrv - FUNC_EVERY_100_MSECOND
xsns - FUNC_EVERY_100_MSECOND
xdrv - FUNC_EVERY_250_MSECOND
xsns - FUNC_EVERY_250_MSECOND
xdrv - FUNC_EVERY_SECOND
xsns - FUNC_EVERY_SECOND
WIF: Attempting connection...
WIF: Network (re)scan started...
WIF: Attempting connection...
WIF: Attempting connection...
WIF: Attempting connection...
WIF: Network 0, AP1, SSId indebuurt1, Channel 1, BSSId 24:D3:F2:97:C0:A1, RSSI -86, Encryption 1
WIF: Network 1, AP2, SSId indebuurt2, Channel 5, BSSId A0:AB:1B:7D:42:AC, RSSI -42, Encryption 1
WIF: Network 2, AP-, SSId indebuurt3, Channel 12, BSSId 60:E3:27:58:77:E6, RSSI -84, Encryption 1
WIF: Connecting to AP2 indebuurt2 in mode 11N as wemos2...
WIF: Attempting connection...
WIF: Attempting connection...
WIF: Attempting connection...
WIF: Connected
xdrv - FUNC_WEB_ADD_HANDLER
xsns - FUNC_WEB_ADD_HANDLER
HTP: Web server active on wemos2 with IP address 192.168.2.191
NTP: Drift 0, (UTC) Wed Nov 06 13:57:08 2019, (DST) Sun Mar 31 02:00:00 2019, (STD) Sun Oct 27 03:00:00 2019
APP: Boot Count 500
MQT: Attempting connection...
MQT: Connected
MQT: tele/wemos2/LWT = Online (retained)
MQT: cmnd/wemos2/POWER =
MQT: Subscribe to cmnd/wemos2/#
MQT: Subscribe to cmnd/sonoffs/#
MQT: Subscribe to cmnd/DVES_15568C_fb/#
xdrv - FUNC_MQTT_SUBSCRIBE
MQT: tele/wemos2/INFO1 = {"Module":"Generic","Version":"7.0.0.3(tasmota)","FallbackTopic":"cmnd/DVES_15568C_fb/","GroupTopic":"cmnd/sonoffs/"}
MQT: tele/wemos2/INFO2 = {"WebServerMode":"Admin","Hostname":"wemos2","IPAddress":"192.168.2.191"}
MQT: tele/wemos2/INFO3 = {"RestartReason":"Software/System restart"}
MQT: stat/wemos2/RESULT = {"POWER1":"OFF"}
MQT: stat/wemos2/POWER1 = OFF
MQT: stat/wemos2/RESULT = {"POWER2":"ON"}
MQT: stat/wemos2/POWER2 = ON
xdrv - FUNC_MQTT_INIT
CFG: Saved to flash at FA, Count 1582, Bytes 4096