Wireless-tag SigmaStar SSD201 - 3.13 ESP32-WROOM-32 U

SSD201/202 7-inch Smart Display User manual
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Wireless-Tag Technology Co., Limited http://www.wireless-tag.com
Table 11. Debug interface definition
Pin No.
Pin definition
Description
1
PM_TX
Connect directly to CPU pin, 3.3V level
2
PM_RX
Connect directly to CPU pin, 3.3V level
3
GND
Power ground
4
NC
NC
3.13 ESP32-WROOM-32U
The motherboard can achieve a wide range of communication connection by connecting an
external module Wi-Fi+BT+BLE MCU (ESP32-WROOM-32U). The programming interface of
the module is shown in the following table:
Figure 13. ESP32-WROOM-32U programming interface pin diagram
Table 12. ESP32-WROOM-32U programming interface definition
Pin No.
Pin definition
Default function
1
RX
Receive data
2
TX
Transmit data
3
GND
GND