Havaxer™ 0 is a multiple inputs and outputs of different kinds controller that allows various functions. With an added-on OLED, built-in two buttons and an UART interface. Designed to control an HVAC system.

01

Model 01 is a PIC based and provides:

Connections:

PIC MCU socket (20 pin, DIP)
PICkit ICSP header
UART, PICkit compatible header (3.3 V)
eBUS adapter (24 V) to UART
I2C display header (3.3 V)
I2C QWIIC connector
USB-C connector (power only)
alternative power supply terminal (7-33 V)

Inputs:

5x analog temperature sensor (NTC 10k)
1x mains optocoupler (250 VAC)

Outputs:

3x mechanical relay (250 VAC, 10 A)
2x solid state relay - triac (220 VAC, 1.2 A)
1x driver (5 VDC, 100 mA)

02

Model 02 is an ESP32-C6 based with network connectivity (wi-fi).

MCU is the Espressif ESP32-C6-WROOM-1 N8 model and provides:

32-bit RISC-V architecture
1-core CPU with max 160 MHz
8 MB flash
2.4 GHz Wi-Fi 6 with an on-board PCB antenna
Bluetooth 5 (LE)
Zigbee & Thread

Connections:

TIO header (twin general purpose input/output, 3.3 V)
UART header (3.3 V)
eBUS adapter (24 V) to UART
I2C display header (3.3 V)
I2C QWIIC connector
USB-C connector (programming, debugging and power)
alternative power supply terminal (7-33 V)

Inputs:

6x analog temperature sensor (NTC 10k)
2x mains optocoupler (250 VAC)

All inputs are multiplexed to the one MCU pin, so only one programmatically selected input can be read at once.

Outputs:

4x mechanical relay (250 VAC, 10 A), one shared with TIO
4x solid state relay - triac (220 VAC, 1.2 A)
2x driver (5 VDC, 100 mA), one shared with TIO

All outputs are wired via additional hardware gates that need to be opened programmatically.