Hardware Introduction; Pins Definition; Usr-Wifi232-A2 Pins Definition - Jinan USR IOT Technology USR-WIFI232-A2 User Manual

Baked required with 24 hours at 125 ± 5 ℃ before rework process for two modules, one is

new module and two is board with module.
Recommend to store at ≦10% RH with vacuum packing.

If SMT process needs twice reflow:

(1) Top side SMT and reflow
Case 1: Wifi module mounted on top side. Need to bake when bottom side process over 168
hours window time, no need to bake within 168 hours.
Case 2: Wifi module mounted on bottom side, follow normal bake rule before process.
Note:
Window time means from last bake end to next reflow start that has 168 hours space.

3 Hardware Introduction

3.1 Pins Definition

3.1.1 USR-WIFI232-A2 Pins Definition

Pin Description
1 Ground--GND
2 VCC 3.3V@350mA
3
UART Data Transmit
Jinan USR IOT Technology Limited
USR-WIFI232-A2 User Manual
(2) Bottom side SMT and reflow
Figure 6 USR-WIFI232-A2
Figure 7 USR-WIFI232-A2 Pins Map
Table 3 USR-WIFI232-A2 Pins Definition
Name
GND
3.3V
UART_TXD
Page 12 of 76
http://www.usriot.com
Directio Note
n
Power Ground
Power 3.3V @ 350mA power input
O If not use UART function,
tec@usr.cn