Microchip Technology RN4870, Руководство пользователя

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2016 Microchip Technology Inc. DS50002547A-page 27
3.7 READING SENSOR BOARD PERIPHERAL IO PORTS USING UART
COMMANDS
The RN4870/71 module has digital and analog peripheral inputs and outputs. For a
detailed description of the IO interfaces, refer to the
“RN4870/71 Bluetooth
®
4.2 Low
Energy Module Data Sheet” (DS50002489), and for the configuration details, refer to
Section 2.4.24 and Section 2.6.5 through Section 2.6.8 of the RN4870/71 Bluetooth
®
Low Energy Module User’s Guide” (DS50002466). Peripheral IO can be accessed
through direct UART commands or over Bluetooth Low Energy connection by associ-
ating a GATT characteristic with a peripheral input or output.
In this section, UART commands are used to access peripheral IO on the Sensor board
connected to the RN4870 PICtail as illustrated in
Figure 3-13 .
1. Connect the Sensor board to the RN4870 PICtail as shown in Figure 1-1 .
2. Set Factory Default to default Peripheral IO functions:
• Using Terminal Emulator, open the COM port to the RN4870 module
• Type
$$$
to enter Command mode
• Enter
SF,1
and verify that the module reboots after the command is
entered.
3. Type the following sequence of commands to set the RN4870 IO pin into the con-
figuration as illustrated in Figure 3-13 :
• Type
$$$
to enter Command mode
• Enter
+
to enable local echo
• Enter
SW,01,00
for ADC input port 01 used by the light sensor
• Enter
SW,02,00
for ADC input port 02 used by the potentiometer
• Enter
SW,03,00
to configure digital IO port connected to the LED
• Enter
SW,04,09
to configure digital IO trigger connected to the push button
• Enter
SF,1
to reboot the module for the settings to take effect