The shield uses a HM-10 module with Texas Instruments® CC2541 Bluetooth v4.0 BLE chip, fully compatible with the Arduino UNO. This shield has extended all the digital and analog pins out into 3PIN, making it easy to connect to sensors using 3PIN wire.
Features:

1. extends 14 digital pins to 3pin
2. extends 6 analog pins to 3pin
3. on-board reset button
4. comes with a slide switch to power wireless communication on or off
5. jumper interface to control serial communication
6. integrated Texas Instruments® CC2541 Bluetooth v4.0 chip on board

Specifications:

1. pin header spacing: 2.54 mm
2. Bluetooth® chip: Texas Instruments® CC2541
3. USB protocol: USB V2.0
4. working frequency: 2.4 GHz ISM band
5. modulation method: GFSK (Gaussian Frequency Shift Keying)
6. transmission power: -23 dbm, -6 dbm, 0 dbm, 6 dbm, can be modified by AT command
7. sensitivity: =-84 dBm at 0.1% BER
8. transmission rate: asynchronous 6K bytes
9. security: authentication and encryption
10. supporting service: central & peripheral UUID FFE0, FFE1
11. power consumption: 400-800 uA during standby, 8.5 mA during transmission
12. power supply shield: 5 VDC
13. power supply HM10: 3.3 VDC
14. working temperature: -5 to +65 °C
15. dimensions: 54 x 48 x 23 mm
16. weight: 19 g

vma338_test.zip

cc2541_datasheet.pdf

bleserialport.apk

bleserialport.zip

vma338_wpsh338_scheme.pdf

wpsh338a4v01.pdf

1830026-wpsh338_ce_ukca_reach.pdf