User's Manual

1. Introduction to ESP32-
WATG-32D
1.1. ESP32-WATG-32D
ESP32-WATG-32D is a custom WiFi-BT-BLE MCU module for giving the “Connectivity
Function” to customer’s different products, including Water Heater and Comfort
Heating Systems.
Table 1 provides the specifications of ESP32-WATG-32D.
Table 1: ESP32-WATG-32D Specifications
Categories
Items
Specifications
Wi-Fi
Protocols
802.11 b/g/n (802.11n up to 150 Mbps)
A-MPDU and A-MSDU aggregation and 0.4 µs guard
in-
terval support
Frequency range
2400 MHz ~ 2483.5 MHz
Bluetooth
Protocols
Bluetooth v4.2 BR/EDR and BLE specification
Radio
NZIF receiver with –97 dBm sensitivity
Class-1, class-2 and class-3 transmitter
AFH
Audio
CVSD and SBC
Hardware
Module interfaces
UART, I
2
C, EBUS2, JTAG, GPIO
On-chip sensor
Hall sensor
Integrated crystal
40 MHz crystal
Integrated SPI flash
8 MB
Integrated DCDC Converter
3.3 V, 1.2 A
Operating voltage/Power
supply
12 V / 24 V
Maximum current delivered
by
power supply
300 mA
Recommended operating
tem-
perature range
–40 °C ~+ 85 °C
Module Dimensions
(18.00±0.15) mm × (31.00±0.15) mm × (3.10±0.15)
mm