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GL-S10 API Manual

Version Date Commit
V1.0.0 2019-10-18 -


GL-S10 is a BLE-WiFi gateway aimming to provide a simple method conversing Bluetooth Low Energy to WiFi. It supports GAP and GATT, can act as GATT server or GATT client. WiFi is used in STA mode, connect the superior router to access to the network. Also it can connect to network through Ethernet. It has a built-in standard MQTT client which could connect to any standard MQTT server. Using MQTT, it can forward BLE messages to the cloud and on the other hand forward messages from cloud to the connected BLE device through BLE notify.

gl-s10 use case


GL-S10 provide a BLE instructions set. Send commands and messages by writting GATT characteriscs , and get responses or messages from BLE notification.
Following is the steps to use this gateway.

1. Scan and connect

The gateway act as a GATT server and broadcast itself once power-on. Its name is "GL-S10". Firstly start the BLE scan and search the name "GL-S10" using your BLE device, then connect to it.

2. Enable the notify

The gateway BLE has two GATT services.
One is for receiving commands and messages. Its service UUID is 000000FF-0000-1000-8000-00805F9B34FB, has only one characteristic, UUID is 0000FF01-0000-1000-8000-00805F9B34FB. Its characteristic property is write.
Another is for notification. Its service UUID is 000000EE-0000-1000-8000-00805F9B34FB, has only one characteristic, UUID is 0000EE01-0000-1000-8000-00805F9B34FB. This characteristic property is read|notify.
To get the notification, you have to enable the notify function of the second service.

3. Send commands or messages

Commands must be written in the first service (Service UUID 000000FF-0000-1000-8000-00805F9B34FB, Character UUID 0000FF01-0000-1000-8000-00805F9B34FB).
And commands must be in special format.
It begins with a byte 0xFE , following is a byte "Opcode". It is operation code, corresponds to different operations.
Next is "Data". It is the parameters for this command. Its length is not fixed and can be zero. (Note that the "Data" must be converted to hexadecimal Ascci code array) .
At end is a byte 0xFF.

Command Format

FE Opcode Data FF


Opcode Operation Need Data? Description
0x01 SET_WIFI_CONFIG Y Set WiFi ssid and password
0x02 START_WIFI N Start WiFi
0x03 STOP_WIFI N Stop WiFi
0x04 RESTART_WIFI N Restart WiFi
0x05 GET_NETWORK_STATE N Get current network state, WiFi ssid and IP address
0x06 CLEAR_WIFI_CONFIG N Clear WiFi ssid and password
0x65 SET_MQTT_URI Y Set MQTT connect uri
0x69 GET_MQTT_CONFIG N Get current MQTT uri
0x6A CLEAR_MQTT_CONFIG N Clear MQTT connent uri
0x6B MQTT_SUBSCRIBE Y Subscribe MQTT topic
0x6C MQTT_UNSUBSCRIBE Y Unsubscribe MQTT topic
0x6D MQTT_PUBLISH Y Publish MQTT message to broker

Data Format (For some special operation)

Opcode Operation Data Format Example
0x01 SET_WIFI_CONFIG ssid@password GL-S1300-9cc@12345678
0x65 SET_MQTT_URI username:password@host:port admin:password@
0x6B MQTT_SUBSCRIBE qos@topic 0@test
0x6C MQTT_UNSUBSCRIBE topic test
0x6D MQTT_PUBLISH qos@topic@data 0@test@Hello world!

For example, write uint8array fe 01 74 65 73 74 77 69 66 69 40 31 32 33 34 35 36 37 38 ff to the first GATT service means set the wifi to one whose ssid is "testwifi", password is "12345678" .

4. Get response and messages

Every command will return a response indicating whether it sucess or not. It is sent by BLE notification in the second service (Service UUID 000000EE-0000-1000-8000-00805F9B34FB, Character UUID is 0000EE01-0000-1000-8000-00805F9B34FB). The response format is similar with command format.

Response Format

FE Opcode Result FF

"Opcode" is the command's Opcode it response to. "Result" is the command execution result, 0 means success and non-zero is failed. For example, get a notification fe 01 00 ff means command SET_WIFI_CONFIG excute successfully

Result format(For some special response)

Opcode Operation Data Format Example
0x05 GET_NETWORK_STATE state@mode@IP address@ssid 1@0@
0x69 GET_MQTT_CONFIG state@user:password@host:port 1@admin:password@

"state" is the connection state for network or MQTT, 1 means connected, 0 means disconnect. "mode" is the connection mode, 0 means connected by WiFi, 1 means by Ethernet.For example, get a notification fe 05 31 40 30 40 31 39 32 2e 31 36 38 2e 31 2e 31 31 31 40 74 65 73 74 77 69 66 69 ff means get the current network state: network is connected, using wifi, ip address is, ssid is "testwifi"

MQTT message format

Sometimes your BLE devices have to recieve messages from the cloud(MQTT broker). Here the gateway get the msg from the cloud and then send out by BLE notification

FE Opcode Data FF
FE 6E topic@msg FF

For example, notification fe 6e 74 65 73 74 40 48 65 6c 6c 6f 20 77 6f 72 6c 64 21 ff means recieve a message "Hello world!" from topic "test".

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