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OpenTherm Master Board - ESP32-S3

OpenTherm Master Board - ESP32-S3
OpenTherm Master Board - ESP32-S3
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OpenTherm Master Board - ESP32-S3
OpenTherm Master Board - ESP32-S3
OpenTherm Master Board - ESP32-S3
  • Availability: Directly available from warehouse in Eindhoven
  • SKU: 007669
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€14.50
Ex Tax: €11.98
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The OpenTherm Master Adapter is development board based on a ESP32-S3 microcontroller. OpenTherm is a standardized protocol used between a thermostat (master) and a boiler (slave). This adapter emulates the thermostat (master) and thus acts as a replacement (they cannot be used simultaniously).

For additional connectivity, extra GPIO pins have been broken out. Standard 2.54mm pin headers or 3 Grove (compatible) connectors can be soldered onto them. Neither is included.

Note: The name on the silkscreen ("slave adapter") of the V1.1 variant is confusing/incorrect. It is actually a master board.

Note: A detachable screw terminal is not included, so one of the following must be ordered separately:

See the following page for an example with Home Assistant (/ESPHome): Home Assistant

See the following page for more information: GitHub

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Tags: Microcontroller Boards , With Bluetooth , OpenTherm Master Board - ESP32-S3 , 007669 , LEOTRO , Microcontroller (MCU) , I2C , I2S , SPI , Native USB , UART , PWM , ADC , GPIO , USB CDC , OpenTherm , Wi-Fi , Bluetooth

Specifications

General
Brand LEOTRO
Model revision V1.2
Norm conformity RoHS
Features Microcontroller (MCU)
General physical appearance
Main color Blue
Weight [g] 9
Dimension X [mm] 40
Dimension Y [mm] 40
Mounting options Mounting hole(s)
Diameter mounting hole(s) [mm] 3.2
Form factor Module (general)
General electrical properties
Minimum supply voltage [V DC] 5
Maximum supply voltage [V DC] 5
Minimum IO-pin input voltage [V] 3.3
Maximum IO-pin input voltage [V] 3.3
IO-pin output voltage [V] 3.3
Maximum IO-pin source current [mA] 40
Maximum IO-pin sink current [mA] 28
MCU
Manufacturer Espressif
Chip series ESP32-S3
Maximum clock frequency [MHz] 240
Number of cores 2
Internal memory
SRAM [KB] 512
PSRAM [MB] 2
Flash memory [MB] 8
EEPROM type Emulated
Communication
Hardware interface(s) ADC
I2C
I2S
PWM
SPI
GPIO
UART
USB CDC
OpenTherm
Native USB
Available GPIO pins 3, 6, 7, 8, 10, 13, 14, 18, 38, 39
Number of IO-pins 10
Maximum available hardware PWM channels 10
Maximum available analog input pins (ADC) 8
Maximum available analog output pins (DAC) 0
Maximum available hardware UART interfaces 3
Maximum available hardware I2C interfaces 2
Maximum available hardware SPI interfaces 2
USB to serial converter Integrated into microcontroller
Wireless communication
Interface(s) Wi-Fi
Bluetooth
Wi-Fi chip/SoC ESP32-S3
Wi-Fi frequency [GHz] 2.4
Bluetooth chip/SoC ESP32-S3
Bluetooth version 5.0
Supported Bluetooth standard(s) LE
Connectors
Power supply connector(s) USB-C female
Through hole solder pin(s) (2.54mm)
IO-connector(s) USB-C female
Detachable block male (EDG-3.81)
Through hole solder pin(s) (2.00mm)
Through hole solder pin(s) (2.54mm)
Wi-Fi/Bluetooth antenna connector Built-in antenna
Package contents
Package contents 1x Development board

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