How to connect nRF2740 to Arduino Micro

RE: How to connect nRF2740 to Arduino Micro

Alessandro Menegatti — Thu, 13 Mar 2014 10:46:49 GMT

I'm actually using dividers and converters on each line. Please let me know when you will test it on a Micro board.

RE: How to connect nRF2740 to Arduino Micro

run_ar — Thu, 13 Mar 2014 09:30:10 GMT

Hi,

Unfortunately I don’t have a micro here right now, but I will check if I can order one. As far as I can see the Micro is a 5V board, so you should use resistive dividers or level converters for the lines. If you don’t, you risk damaging the nRF8001. However I have successfully connected the nRF8001 to the Arduino Uno without using dividers/convertes, but it is not possible to predict for how long it will take before the nRF8001 is damaged (It could be damaged right away).

About connecting the module to the micro; Did you try: Board_name = board default. REQN-> SS RDYN -> 3 MOSI -> MOSI MISO -> MISO SCK -> SCK RESET -> 4 VSS -> 3v3 GND -> GND

Notice that there is an example project called ble_aci_transport_layer_verification that can be used to verify if the transport layer is actually working on your board. Once you have verified that, you could try the hello world project.

Best regards, Runar

RE: How to connect nRF2740 to Arduino Micro

Alessandro Menegatti — Thu, 13 Mar 2014 01:32:59 GMT

I tried any type of combinations of the pins and all the examples, but I never managed to make it visible from the iPhone or the Master Control Panel. I really don't know how to do. Can you please help me?

RE: How to connect nRF2740 to Arduino Micro

Alessandro Menegatti — Tue, 11 Mar 2014 20:22:15 GMT

I tried that but it's still not working.

RE: How to connect nRF2740 to Arduino Micro

run_ar — Tue, 11 Mar 2014 09:07:08 GMT

You have to change the board_name to BOARD_DEFAULT

RE: How to connect nRF2740 to Arduino Micro

Alessandro Menegatti — Mon, 10 Mar 2014 23:28:46 GMT

Thank you very much for the explanation. I just have one problem. If I use the following pin configuration (described in the hello world example), the nRF8001 is not working and I can't discover it using my Master Control Panel:


        aci_state.aci_pins.board_name = REDBEARLAB_SHIELD_V1_1; //See board.h for details REDBEARLAB_SHIELD_V1_1 or BOARD_DEFAULT
	aci_state.aci_pins.reqn_pin   = 9; //SS for Nordic board, 9 for REDBEARLAB_SHIELD_V1_1
	aci_state.aci_pins.rdyn_pin   = 8; //3 for Nordic board, 8 for REDBEARLAB_SHIELD_V1_1
	aci_state.aci_pins.mosi_pin   = MOSI;
	aci_state.aci_pins.miso_pin   = MISO;
	aci_state.aci_pins.sck_pin    = SCK;
	
	aci_state.aci_pins.spi_clock_divider          = SPI_CLOCK_DIV8;
	  
	aci_state.aci_pins.reset_pin             = 4; //4 for Nordic board, UNUSED for REDBEARLAB_SHIELD_V1_1
	aci_state.aci_pins.active_pin            = UNUSED;
	aci_state.aci_pins.optional_chip_sel_pin = UNUSED;

RE: How to connect nRF2740 to Arduino Micro

run_ar — Mon, 10 Mar 2014 15:07:48 GMT

Hi,

Please take a look at the readme file for the Arduino SDK. You should open one of the projects to see which pins are configured by default. I suggest starting with the hello world project.

The HW layout of the nRF8001 module can be found here.

Notice the following in the main readme file: “When using the nRF2740/nRF2741 modules directly wired to the Arduino:

When the Arduino uses a 5v microcontroller, you may have to use level converters or a resistive divider to get the voltage to 3.3v for the lines that are output from Arduino to the nRF8001. The Arduino(3.3v-1.9v) or the Arduino DUE can be wired directly to the nRF8001 without any level converters or resistive dividers.”

Best regards, Runar