MHI-AC-Ctrl v2.8

MHI-AC-Ctrl by absalom-muc

v2.8 (September 2023)

• when ds18x20 used and get disconnected, fallback to IU temperature sensor by glsf91
• added status and control 3D auto and vanes L/R (extended frame size (33) used like WF-RAC module). You have to enable this! #77 by glsf91
• added SRK35ZC-S to unsupported list #154 by glsf91
• Add SRC35ZSA-W to supported model list
• change link to esphome in sw-configuration.md

v2.7R4 (April 2023, draft version)

• changed setup WiFi connection to async; module starts already communicating with AC during WiFi setup and also during scanning when WiFI_SEARCHStrongestAP is used by glsf91
• added CONTINUE_WITHOUT_MQTT; module keeps communicating with AC if MQTT is disconnected. See also description in SW-Configuration.md and #144 by glsf91
• fix bug for publish list of access points by glsf91
• added SRK71ZEA-S1 to unsupported list #143 by glsf91
• added Web page #141 to integration list by glsf91

v2.7R3 (March 2023, draft version)

• fix some compiler warnings by glsf91
• change sending MISO with faster refresh of data every 20s by glsf91
• avoid jitter with internal temperature sensor, now updating atmost every 5s by glsf91
• fix print wifi encryption type by glsf91
• skip not usable values for DB18B20 by glsf91

v2.7R2 (March 2023, draft version)

• Added energy kWh from airco by glsf91.

v2.7R1 (February 2023, draft version)

• Fix for fan not showing 4 and Auto after powerdown AC #132 according to #99 (comment) by glsf91.

MHI-AC-Ctrl v2.6

MHI-AC-Ctrl by absalom-muc

v2.6 (January 2023)

• Fix of Wifi reconnect takes too long #125
• Typo related to the unit of TD fixed in MHI-AC-Ctrl-core.h and SW-Configuration.md

v2.6R5 (December 2022, draft version)

• Added ROOM_TEMP_DS18X20_OFFSET for issue Adding offset for external temperature sensor #119

v2.6R4 (December 2022, draft version)

• Added Enhance resolution of Tsetpoint according to pull request #123 by glsf91.

v2.6R3 (December 2022, draft version)

• Added switch for Troom filtering to address issue #82.

v2.6R2 (August 2022, draft version)

• final implementation for fan control incl. 'Auto', see issue. This is a breaking change, because in the past only the values 1, 2 , 3, 4 were supported for fan status and fan control. Now "Auto" was added.
• added temporary operating data "unknwon" to find out which functions are supported by SPI dependent on the indoor AC unit.

v2.6R1 (August 2022, draft version)

• new implementation for fan control incl. 'Auto', see issue

MHI-AC-Ctrl v2.5

v2.5 (August 2022)

• release w/o changes

v2.5R3 (June 2022, draft version)

• moved the functions for frequency measurement from MHI-AC-Ctrl.ino to support.cpp
• moved some MQTT init handling from MHI-AC-Ctrl.ino void setup() to MQTTloop()
• moved long previousMillis = millis to inside void loop() as static
• added parameter WiFI_SEARCH_FOR_STRONGER_AP_INTERVALL
• Reworked WiFi network re-scan function
• added work around for "not updating WiFi.status()", see esp8266/Arduino#7432
• ICACHE_RAM_ATTR is deprecated, replaced by IRAM_ATTR
• removed switch ROOM_TEMP_MQTT in support.h, a Troom MQTT set command is always considered

v2.5R21 (December 2021, draft version)

• calculation of RETURN-AIR in MHI-AC-Ctrl.ino corrected
• Removed the option #define ROOM_TEMP_IU for adaption by the user in support.h. Now it is generated automatically when ROOM_TEMP_DS18X20 and ROOM_TEMP_MQTT are not defined
• Reworked WiFi network re-scan function
• increased resolution of Tsetpoint to 0.5°C

v2.5R1 (November 2021, draft version)

• Version number now located in support.h, published once MQTT connection is available

Versioning changed

Released versions are availabe on the release page
All other versions are draft. A new version ends with "R1", "R2"-postfix etc. before it is released w/o "R"-postfix, e.g. v2.5R1 => v2.5R2 => v2.5
For documentation updates usually no new version number is created.

v2.3 (September 2021, draft version)

• for MHI_AC_Ctrl_Core::loop return value err_msg_timeout replaced by the more detailed return values err_msg_timeout_SCK_low and err_msg_timeout_SCK_high added
• output of the number of WiFi and MQTT lost since last reset
• output of the BSSID used for the WiFi connection
• use of the strongest WiFi access point (testing incomplete)
• option added to use the room temperature from DS18x20 sensor or from MQTT topic instead of AC IU sensor

MHI-AC-Ctrl v2.2

• PCB layout update to v2.2 allows to plug-in MHI-AC-Ctrl directly into the AC without using a cable

MHI-AC-Ctrl v2.03

v2.03 (July 2020)

• WiFi mode restricted to STA (no more AP) in support.cpp
• Functionality for POWERON_WHEN_CHANGING_MODE improved, the according #define shifted to support.h
• Further reduction of memory usage
• Compiler warnings removed
• set-mechanism reworked
• SCK by SCK_PIN replaced according to pull request 19
• Shifted void MeasureFrequency() from support.cpp to MHI-AC-Ctrl-core.cpp
• Testprog 2.1 in SPI_logger.ino adapted to create SPI waveforms in .vcd for viewing e.g. in PulseView

MHI-AC-Ctrl v2.0

v2.0 (June 2020)

• code refactored to allow simplified adaption for other frameworks (e.g. Tasmota, Home Assistant), main changes
  • MHI-AC-Ctrl-core separated according to Issue #13
  • Changeable defs for all topics and payload according to this Pull request
• Option added to switch on the AC when the mode is changed according to Issue #14
• Added operating data THO-R1, THO-R2, THO-R3, THO-R1 and TD added
• Handling for operating data "PROTECTION-No" and "CT" corrected
• Output of the frame raw data is no longer supported
• MQTT.md replaced by SW-Configuration.md
• Test programs added here

MHI-AC-Ctrl v1.4

v1.4 (April 2020)

• Vanes MQTT status corrected
• Frequency measurement limits adapted, ESP is halted only when there is a toggle on MISO detected, results of the measurement will be published via MQTT
• some operating data added (MQTT path changed)
• error operating data added
• reset via MQTT for ESP8266 added
• support of an external DS18x20

Please check this issue not considered in the release.