Oliver Walter
c49fff9faf
The README carried a fragment, which is enough to show the shape but not enough to flash. These are complete configs: wiredsensor.yaml one node, every measurement and diagnostic register wiredsensor-node.yaml one node as a reusable package, parameterised by address bus-of-nodes.yaml three nodes on one segment, via that package All three validate against ESPHome 2026.7, and the expanded config was checked register by register rather than only for schema validity — a wrong address or value_type validates perfectly and then reports a plausible but wrong temperature, which is the failure mode worth guarding against. Two things the fragment in the README was missing and a real config cannot be: flow_control_pin on the modbus component. Without it the ESP32 never asserts DE, so nothing reaches the segment and the node looks dead. The generated fragment now carries it too. The read/holding split for diagnostics. ESPHome merges adjacent registers of one register_type into a single command, and a read overlapping 0x0000..0x0004 is refused when the sensor has never produced a reading — so diagnostics merged into the measurement command go unavailable exactly when they are needed. Asking for them as `holding` puts them in their own command. Serials are text_sensors with raw_encode: HEXBYTES rather than numeric sensors, because Home Assistant stores states as float32 and 24 bits of mantissa cannot hold a 32-bit serial. Uptime has the same limit and is left numeric with a note; quantising past 194 days does not matter for spotting a reboot. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
95 lines
2.2 KiB
YAML
95 lines
2.2 KiB
YAML
# Several wiredsensor nodes on one RS485 segment, read by a single ESP32.
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#
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# The point of a bus: one gateway, one pair of wires, N sensors. Each node needs
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# a distinct UNIT_ADDRESS, which means one firmware image per node — see the
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# Configuration section of the top-level README.
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#
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# esphome run bus-of-nodes.yaml
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#
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# The per-node entities live in wiredsensor-node.yaml and are instantiated once
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# per address below, so adding a node is three lines rather than a copied block.
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substitutions:
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name: rs485-gateway
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friendly_name: "RS485 gateway"
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baud_rate: "19200"
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tx_pin: GPIO17
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rx_pin: GPIO16
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de_pin: GPIO4
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esphome:
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name: ${name}
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friendly_name: ${friendly_name}
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esp32:
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board: esp32dev
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framework:
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type: esp-idf
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logger:
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level: INFO
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api:
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encryption:
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key: !secret api_encryption_key
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ota:
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- platform: esphome
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password: !secret ota_password
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wifi:
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ssid: !secret wifi_ssid
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password: !secret wifi_password
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ap: {}
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captive_portal:
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# ---------------------------------------------------------------- the bus ---
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uart:
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id: rs485
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tx_pin: ${tx_pin}
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rx_pin: ${rx_pin}
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baud_rate: ${baud_rate}
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data_bits: 8
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parity: NONE
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stop_bits: 1
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modbus:
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id: rs485_bus
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uart_id: rs485
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flow_control_pin: ${de_pin}
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# ----------------------------------------------------------------- nodes ---
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#
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# One entry per node. `node_id` must be unique; `node_addr` must match that
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# node's UNIT_ADDRESS.
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#
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# Requests are serialised across the whole bus — ESPHome waits for each response
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# before sending the next — so poll cost scales with node count. A node answers
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# roughly 2 ms after the request ends, so a dozen nodes at 30 s is nowhere near
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# saturating the segment. If you do see timeouts, `command_throttle` on the
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# controllers is the knob, not `update_interval`.
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packages:
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hallway: !include
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file: wiredsensor-node.yaml
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vars:
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node_id: node_hallway
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node_addr: "0x01"
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node_name: "Hallway"
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cellar: !include
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file: wiredsensor-node.yaml
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vars:
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node_id: node_cellar
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node_addr: "0x02"
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node_name: "Cellar"
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greenhouse: !include
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file: wiredsensor-node.yaml
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vars:
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node_id: node_greenhouse
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node_addr: "0x03"
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node_name: "Greenhouse"
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