Oliver Walter
131ae200ee
The USB-RS485 bridge lets a PC drive a segment from tools/wiredsensor.py, which is a bench arrangement: it needs a host awake and attached. A Waveshare ESP32-S3-Relay-6CH does the same master role permanently and brings six relays of its own, so one board both reads the node and switches things in response. Every pin is fixed by the board and was read off its schematic, so they are written literally rather than as substitutions — a substitution would imply a choice that does not exist. Relays sit on GPIO1/2/41/42/45/46, the WS2812 on GPIO38, the buzzer on GPIO21 and RS485 on GPIO17/18. Two of those deserve their comments. GPIO45 and GPIO46 are strapping pins, and GPIO45 selects the flash supply voltage: the internal pulldown gives 3.3V at reset and the pin is released back to it even with the relay energised, but anything external holding it high across a reset selects 1.8V and the module will not boot at all. The strapping warnings from `esphome config` are left unsuppressed for that reason — channels 5 and 6 can also click during reset, so the warning is not crying wolf. The `modbus:` component sets no flow_control_pin, unlike the other configs here. This board derives the SP485EE's driver-enable from the TX line with a 74HC04D, a 54K/1nF RC and a diode, so there is no DE GPIO to name; stated in a comment because an absent option reads as an oversight. flash_size is 16MB, read off the chip with `esptool flash-id` rather than taken from the schematic, which names an ESP32-S3-WROOM-1U with no memory suffix. The logger goes to USB_SERIAL_JTAG because the Type-C is wired straight to native USB with no bridge chip, and the default hardware UART would log to pins this board does not break out. The node's entities are inline rather than from wiredsensor-node.yaml, which creates its own modbus_controller and would leave two of them polling address 0x01. Verified on hardware: the gateway reports 23.624 C and 43.35 %RH with zero bus CRC errors while the node's own USB diagnostics independently show 23.72 C and 43.04 %RH over the same window, drifting in step. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
11 lines
437 B
Plaintext
11 lines
437 B
Plaintext
/target
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__pycache__/
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# ESPHome. Unanchored so they hold anywhere in the tree, not just next to the
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# configs: secrets.yaml carries wifi credentials and the API/OTA keys, and
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# .esphome is build state (including .pioenvs). examples/esphome/.gitignore says
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# the same thing directory-locally because ESPHome regenerates it on every run;
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# these entries are the ones that matter if a config is ever built elsewhere.
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secrets.yaml
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.esphome/
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