Arduino Nano, How to reduce Connection Time

[MFAISALREHMAN]

Hello My My arduino nano connects to ELM327 in about 20 seconds. Is there anyway to reduce this time e.g knowing the connection protocol name and calling the initialize function. Thankx.

I am getting following msgs.

�Attempting to connect to ELM327... Clearing input serial buffer Sending the following command/query: AT D Received char: O Received char: K Received char: \r Received char: \r Received char: > Delimiter found. All chars received: OK Clearing input serial buffer Sending the following command/query: AT Z Received char: A Received char: T Received char: Received char: Z Received char: \r Received char: \r Received char: \r Received char: E Received char: L Received char: M Received char: 3 Received char: 2 Received char: 7 Received char: Received char: v Received char: 1 Received char: . Received char: 5 Received char: \r Received char: \r Received char: > Delimiter found. All chars received: ATZELM327v1.5 Clearing input serial buffer Sending the following command/query: AT E0 Received char: A Received char: T Received char: _ Received char: E Received char: 0 Received char: \r Received char: O Received char: K Received char: \r Received char: \r Received char: > Delimiter found. All chars received: ATE0OK Clearing input serial buffer Sending the following command/query: AT S0 Received char: O Received char: K Received char: \r Received char: \r Received char: > Delimiter found. All chars received: OK Clearing input serial buffer Sending the following command/query: AT AL Received char: O Received char: K Received char: \r Received char: \r Received char: > Delimiter found. All chars received: OK Clearing input serial buffer Sending the following command/query: AT ST 00 Received char: O Received char: K Received char: \r Received char: \r Received char: > Delimiter found. All chars received: OK Clearing input serial buffer Sending the following command/query: AT SP A0 Received char: O Received char: K Received char: \r Received char: \r Received char: > Delimiter found. All chars received: OK Clearing input serial buffer Sending the following command/query: 0100 Received char: 4 Received char: 1 Received char: 0 Received char: 0 Received char: B Received char: E Received char: 3 Received char: E Received char: B Received char: 0 Received char: 0 Received char: 0 Received char: \r Received char: \r Received char: > Delimiter found. All chars received: 4100BE3EB000 Connected to ELM327 Service: 1 PID: 12 Normal length query detected Query string: 010C1 Clearing input serial buffer Sending the following command/query: 010C1 Received char: 4 Received char: 1 Received char: 0 Received char: C Received char: 0 Received char: A Received char: E Received char: B Received char: \r Received char: \r Received char: > elimiter found. All chars received: 410C0AEB Expected response header: 410C Single response detected 64-bit response: responseByte_0: 235 responseByte_1: 10 responseByte_2: 0 responseByte_3: 0 responseByte_4: 0 responseByte_5: 0 responseByte_6: 0 responseByte_7: 0 rpm: 698.75 Service: 1 PID: 5 Normal length query detected Query string: 01051 Clearing input serial buffer Sending the following command/query: 01051

[PowerBroker2]

It looks like it's working, not sure why the connection would start slow

[jimwhitelaw]

@MFAISALREHMAN Are you connecting via Bluetooth or a direct serial connection? If it is BT, you might find it establishes a connection faster if you connect with the device address instead of by name.

[MFAISALREHMAN]

I am connecting through BT with HC-05 module. The module is already paired/Bind with ELM327 through MAC address.