Need help on how to connect HM10 with HMC5883L breakout board

Don't make me laugh by saying that you are trying to do BLUETOOTH development...students like you (i hope you are a student from India) in India thinks that bluetooth development is buying this HM series module and using it...NO IT'S NOT BLUETOOTH DEVELOPMENT...NOR BR/EDR or BLE

It's just a end-user bluetooth or BLE product like your handsfree headset, bluetooth audio etc...the only difference is it's a serial profile which you can use it as USB to TTL wirelessly or any other BLE service pre-installed...in your case HM10 has vendor specific service and characteristic with the UUID of FFE0 and FFE1 respectively. better double check the HM10 data sheet...

Connect the HM10 and HMC5883L with I2C pins, google for how to do it...;)

Now your HM10 is BLE peripheral and you have to code central device, either your smart phone or laptop with BLE will be the one as central device...you need to code now to access the service(FFE0) and characteristic(FFE1) values from your BLE peripheral, your option is Android or iOS for smartphones...windows and OS X for desktop or laptops...

ENJOY your coding

Don't make me laugh by saying that you are trying to do BLUETOOTH development...students like you (i hope you are a student from India) in India thinks that bluetooth development is buying this HM series module and using it...NO IT'S NOT BLUETOOTH DEVELOPMENT...NOR BR/EDR or BLE

It's just a end-user bluetooth or BLE product like your handsfree headset, bluetooth audio etc...the only difference is it's a serial profile which you can use it as USB to TTL wirelessly or any other BLE service pre-installed...in your case HM10 has vendor specific service and characteristic with the UUID of FFE0 and FFE1 respectively. better double check the HM10 data sheet...

Connect the HM10 and HMC5883L with I2C pins, google for how to do it...;)

Now your HM10 is BLE peripheral and you have to code central device, either your smart phone or laptop with BLE will be the one as central device...you need to code now to access the service(FFE0) and characteristic(FFE1) values from your BLE peripheral, your option is Android or iOS for smartphones...windows and OS X for desktop or laptops...

ENJOY your coding

Hi Antony,

Thanks for your reply

I am changing the vendor firmware on HM10 to a custom code to send my custom values over bluetooth ( yes I am programming the module chip itself )

Trying to google out hmc to hm10 pins connections but not getting it...

But thanks for the rest of info in your reply

According to this pinout https://github.com/nickswalker/ble-dev-kit/wiki/HM-10-Pinout, pin 15 of the HM-10 should be SDA (connected to pin 3 of CC2541) and pin 20 should be SCL (connected to pin 2 of CC2541). Have you tried that?

A correction...

I said you can connect the HMC5883L through I2C because the sensor got the I2C pinout...but I am checking the HM-10 data sheet now and I am realising that it's uses UART communication, not I2C. So connect the HMC5883L with Arduino through I2C, connect Arduino UART to HM-10 UART pins(check google for TX,RX,VCC,GND pins), you have to code the Arduino to send HMC5883L sensor data to HM-10 through UART communication... then it's all as I said before...

Oh..so it has I2C..then cool...

As I understand it, he wants to accomplish the task without using an Arduino.

Agreed..my comment was before i saw your comment about availability of I2C communication in CC2541...

Thanks kulky64, I will try it & will update everyone here to what happens.