Datasheet

Command Examples

The following code snippets can be used when operating in Command Mode to perform specific tasks.

Heart Rate Monitor Service

The command list below will add a Heart Rate (https://adafru.it/ddB) service to the BLEFriend's attribute table, with two

characteristics:

Heart Rate Measurement (https://adafru.it/ddD)

Body Sensor Location (https://adafru.it/eck)

# Perform a factory reset to make sure we get a clean start

AT+FACTORYRESET

# Add the Heart Rate service entry

AT+GATTADDSERVICE=UUID=0x180D

# Add the Heart Rate Measurement characteristic

AT+GATTADDCHAR=UUID=0x2A37, PROPERTIES=0x10, MIN_LEN=2, MAX_LEN=3, VALUE=00-40

# Add the Body Sensor Location characteristic

AT+GATTADDCHAR=UUID=0x2A38, PROPERTIES=0x02, MIN_LEN=1, VALUE=3

# Create a custom advertising packet that includes the Heart Rate service UUID

AT+GAPSETADVDATA=02-01-06-05-02-0d-18-0a-18

# Reset the device to start advertising with the custom payload

ATZ

# Update the value of the heart rate measurement (set it to 0x004A)

AT+GATTCHAR=1,00-4A

Python Script

The following code performs the same function, but has been placed inside a Python wrapper using

PySerial (https://adafru.it/cLU) to show how you can script actions for the AT parser.

import io

import sys

import serial

import random

from time import sleep

filename = "hrm.py"