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|git=https://github.com/chaosdorf/projector-controller-iot}}Controls the [[Beamer Hackcenter|projector]] via its RS232 interface. Integrated into [[HomeAssistant]] via MQTT. | |git=https://github.com/chaosdorf/projector-controller-iot}}Controls the [[Beamer Hackcenter|projector]] via its RS232 interface. Integrated into [[HomeAssistant]] via MQTT. | ||
=== Location === | === Location === | ||
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µC: [https://www.espressif.com/en/products/socs/esp32-s3/ ESP32-S3-WROOM] with 8MB flash, [https://www.maxlinear.com/ds/sp3222e_sp3232e.pdf SP3232EEN-L/TR] RS232 transceiver | µC: [https://www.espressif.com/en/products/socs/esp32-s3/ ESP32-S3-WROOM] with 8MB flash, [https://www.maxlinear.com/ds/sp3222e_sp3232e.pdf SP3232EEN-L/TR] RS232 transceiver | ||
Programmable via UART, JTAG, and theoretically USB (the data lines are swapped for this, and would need to be fixed with a knife and soldering iron). | Programmable via UART, JTAG, and theoretically USB (the data lines are swapped for this, and would need to be fixed with a knife and soldering iron) | ||
==== MQTT Topics ==== | |||
===== Commands ===== | |||
{| class="wikitable sortable" | |||
|+ | |||
!Topic | |||
!Arguments | |||
!Description | |||
|- | |||
|<code>/projector-controller/cmd/power</code> | |||
|ON/OFF | |||
|Sends the main power commands | |||
|- | |||
|<code><nowiki>/projector-controller/cmd/(menu|enter|up|down|left|right|back)</nowiki></code> | |||
| | |||
|Emulate keypresses | |||
|- | |||
|<code>/projector-controller/cmd/raw</code> | |||
|Binary data | |||
|Sends raw bytes over serial, framed with <code>[0x02, [...data] 0x03]</code> | |||
|} | |||
===== Status ===== | |||
{| class="wikitable sortable" | |||
|+ | |||
!Topic | |||
!Values | |||
!Description | |||
|- | |||
|<code>/projector-controller/availability</code> | |||
|online/(offline) | |||
|Publishes the controller's availability every couple of seconds | |||
|- | |||
|<code>/projector-controller/stat/power</code> | |||
|ON/OFF | |||
|Publishes the projector's power status '''(doesn't work)''' | |||
|} | |||
== Limitations == | |||
There is a <code>QPW</code> command for querying its current power status, the projector only responds sometimes though. | |||
== References == | |||
Latest revision as of 09:34, 24 September 2025
| RS232 Projector Controller | |
|---|---|
| |
| Ort | Hackcenter |
| Besitzstatus | Leihgabe |
| Kontakt | ente
|
| Git-Repo | https://github.com/chaosdorf/projector-controller-iot |
Controls the projector via its RS232 interface. Integrated into HomeAssistant via MQTT.
Location[edit | edit source]
Technical Details (see git repo)[edit | edit source]
µC: ESP32-S3-WROOM with 8MB flash, SP3232EEN-L/TR RS232 transceiver
Programmable via UART, JTAG, and theoretically USB (the data lines are swapped for this, and would need to be fixed with a knife and soldering iron)
MQTT Topics[edit | edit source]
Commands[edit | edit source]
| Topic | Arguments | Description |
|---|---|---|
/projector-controller/cmd/power
|
ON/OFF | Sends the main power commands |
/projector-controller/cmd/(menu|enter|up|down|left|right|back)
|
Emulate keypresses | |
/projector-controller/cmd/raw
|
Binary data | Sends raw bytes over serial, framed with [0x02, [...data] 0x03]
|
Status[edit | edit source]
| Topic | Values | Description |
|---|---|---|
/projector-controller/availability
|
online/(offline) | Publishes the controller's availability every couple of seconds |
/projector-controller/stat/power
|
ON/OFF | Publishes the projector's power status (doesn't work) |
Limitations[edit | edit source]
There is a QPW command for querying its current power status, the projector only responds sometimes though.