USGA6.01-V1.0
SGW2828-EVK Evaluation Kit User Manual
SG Wireless™ Confidential
6
g.
I2C Operation
The user can connect an I2C device at
J3
posi-
tion, and operate it through AT commands.
Jumper
J10
must be removed during this opera-
tion.
h.
UART Serial Communication
The user can send AT commands though the UART
port of the SGW2828 LoRa module (header
J5
) with
the below pin assignment. The UART operating volt-
age is at 3.3V.
i.
Current Measurement Headers
The SGW2828 LoRa Module is powered by
LoRa_5V and LoRa_3V3. LoRa_5V from USB sup-
plies power to the embedded RF PA, and its power
consumption can be calculated by measuring the
voltage at the precision resistor
R3
(Figure 11).
LoRa_3V3 from LDO supplies power to the embed-
ded MCU, and its power consumption can be cal-
culated by measuring the voltage at the precision
resistor
R2
(Figure 12).
The user can use AT commands to control the LoRa
Module and evaluate its power consumption with
the above methods.
Figure 11: LoRa RF PA Current Measurement
Figure 12: LoRa Current Measurement
Figure 9: SGW2828-EVK I2C Operation
Figure 10: SGW2828-EVK UART