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update readme

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Patrick Moessler 2024-01-28 04:16:11 +01:00
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Readme.md
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@ -6,14 +6,24 @@ by SN74HC595 shift registers.
## Hardware ## Hardware
Connect the shift registers like this, or adapt the pin config as needed: Connect the shift registers like this, or adapt the pin config as needed:
- Data input (DIO) to ESP GPIO19 - Data input (DIO) to ESP:
- Shift clock input (SCK) to ESP GPIO18 - GPIO23 (first display),
- Latch / register clock input (RCK) to ESP GPIO5 - GPIO19 (second display),
- GPIO22 (third display),
- GPIO21 (fourth display)
- Shift clock input (SCK) to ESP GPIO18 (all displays)
- Latch / register clock input (RCK) to ESP GPIO5 (all display)
Keep in mind that the ESP32 is a 3.3V device when connecting to a 5V display. Keep in mind that the ESP32 is a 3.3V device when connecting to a 5V display. The shift registers should handle the 3.3V
signals from the ESP, annd in some cases, 3.3V can also be used to power the displays at a lower brightness.
## Setup ## Setup
> Note: the QSPI driver in esphome is (as of 2024-01-28) not yet in the released package.
> Install a suitable version directly from github with:
> `pip install "esphome @ git+https://github.com/esphome/esphome@1fef769496ed89c0062d8e70f5964b8318ba4550"`
Set the board type in the YAML (default should also work on most ESP32 devices) Set the board type in the YAML (default should also work on most ESP32 devices)
Adapt the config as needed for the fallback AP and if wanted, api key. Adapt the config as needed for the fallback AP and if wanted, api key.
Create a `secrets.yaml` containing this: Create a `secrets.yaml` containing this:
@ -35,4 +45,4 @@ The driver in `components/` is directly based on the existing MAX7219 driver in
subject to the GPLv3 and MIT licenses, as outlined in the LICENSE document (also copied from ESPHome). subject to the GPLv3 and MIT licenses, as outlined in the LICENSE document (also copied from ESPHome).
## Open Issues ## Open Issues
The actual segment mapping is not tested well, due to missing hardware.