BoardPilotOpenTherm adapter (boiler bus to 3.3 V logic) con ESP32
Alimentazione 3.3 V
Bus GPIO
Pin e collegamento all’ESP32
| Pin | Ruolo | Pin ESP32 | Note |
|---|---|---|---|
| IN | Uscita (la pilota il componente) | D25 | What the boiler sends, as a 3.3 V logic signal. To a GPIO with an interrupt |
| OUT | Ingresso (lo pilota l’ESP32) | D26 | What the board sends to the boiler. From an output GPIO |
| VCC | Alimentazione | 3V3 | 3V3 |
| GND | Massa | GND | |
| OT1 | Non collegato all’ESP32 | — | OpenTherm bus to the boiler (2 wires, no polarity). Never to a board pin |
| OT2 | Non collegato all’ESP32 | — | OpenTherm bus to the boiler (2 wires, no polarity). Never to a board pin |
Collegamento consigliato per l’ESP32 DevKit a 30 pin, evitando i pin della flash, di sola lettura e di strapping. BoardPilot lo controlla mentre colleghi.
Da sapere
- The OpenTherm bus works at boiler voltages (well above 3.3 V): connect it only to the adapter's bus terminals, never to a board pin. (OpenTherm Protocol Specification v2.2, Physical layer: voltage levels from the master, current levels from the slave)
Fonti
- OpenTherm Protocol Specification v2.2, Physical layer: two-wire, polarity-free point-to-point link; Manchester-coded frames of 32 bits
Provalo in 3D in BoardPilot
Le basi, spiegate
Lezione: GPIO: pin in ingresso e in uscita GPIO
Componenti simili
A02YYUW waterproof ultrasonic distance (UART)A3144 hall effect switchAM312 mini PIR motion sensorATGM336H GPS/BeiDou moduleBeitian BN-220 GPS moduleBenewake TF-Luna LiDAR (UART mode)
Dati dei componenti: CC BY 4.0, riutilizzabili citando BoardPilot.