UART communication using nRH52840

RE: UART communication using nRH52840

Jared — Thu, 17 Mar 2022 10:13:52 GMT

Good,

I'll close this case then, since it seems that the orginal issue has been resolved. Please create a new ticket for any future issues.

regards

Jared

RE: UART communication using nRH52840

sravich1 — Thu, 10 Mar 2022 10:25:50 GMT

Hi Jared,

we were able to change advertising value which is default set at 18000 to 0 ,then you will have the BLE connected as long it is on...also we were abel to get the Tx and Rx using the App...we will ping you if you further need any help from your side.

regards

Ravi

RE: UART communication using nRH52840

Jared — Thu, 10 Mar 2022 08:52:45 GMT

[quote user="sravich1"]

This is the example code under ble_peripheral/ble_uart...I hope this does both sending as well as receiving..we have not changed any code...let me know where do we need to change for seeing this..

also we want ble to be on once it is powered on..currently it is on for few seconds and ble goes off...any flag or any code where we need to enable to run ble all the time...kindly let me know.

[/quote]

The ble_app_uart peripheral example in the SDK acts as a "bridge" between a serial device and a wireless device, in that it receives data over serial and transports it wireless over BLE to the wireless device, and vice versa. It does not supports having two devices connected over serial without modifications.

The example starts advertising after the initialization routine at the start of main.c. It does not turn it off.

regards

Jared

RE: UART communication using nRH52840

sravich1 — Tue, 01 Mar 2022 09:56:33 GMT

Hi jared,

This is the example code under ble_peripheral/ble_uart...I hope this does both sending as well as receiving..we have not changed any code...let me know where do we need to change for seeing this..

also we want ble to be on once it is powered on..currently it is on for few seconds and ble goes off...any flag or any code where we need to enable to run ble all the time...kindly let me know.

regards

Ravi

RE: UART communication using nRH52840

Jared — Mon, 28 Feb 2022 13:50:49 GMT

[quote user="sravich1"]

first and second instance same pins..do we need different pins??

[/quote]

Yes, only one peripheral can drive any GPIO at a time. You need to debug your application, and see if the data is received correctly from the STM32 and if that data is sent with ble_nus_data_send() correctly.

regards

Jared

RE: UART communication using nRH52840

sravich1 — Mon, 28 Feb 2022 06:36:04 GMT

HI jared,

Any update on my previous message would help..Kindly let me know.

thanks

Ravi

RE: UART communication using nRH52840

sravich1 — Fri, 25 Feb 2022 08:58:52 GMT

Hi jared,

Also I tried with making HWFC false in pca10056.h but connected to pin number 6 and 8.

Then I changed in header file pin numbers to 3 and 4 for GPIO but still did not workdevzone.nordicsemi.com/.../pca10056.h

Kindly let me know

regards

Ravi

RE: UART communication using nRH52840

sravich1 — Fri, 25 Feb 2022 04:26:43 GMT

Hi jared,

Looks like according to your Guide there is something called as dynamic HWFC handling..so your pin 5 and 7 needs to be disabled I think.Am I correct??..If so how do you do this in hardware kit??

Any suggestion would be good...also the Tx is coming from STM32 for this also to work we need to disable HWFC.Kindly let me know.

regards

Ravi

RE: UART communication using nRH52840

sravich1 — Thu, 24 Feb 2022 07:40:24 GMT

also when I run the development board individually the print statement comes properly in the UART...saying UART has started...but when I integrate with STM..I do not see the print statement when I switch both the boards on...any timing issue or any pin connection error..

--Ravi

RE: UART communication using nRH52840

sravich1 — Thu, 24 Feb 2022 07:27:37 GMT

If we remove how to power the board??...but do not connect to the com port???..

--Ravi

RE: UART communication using nRH52840

sravich1 — Thu, 24 Feb 2022 07:26:59 GMT

Hi jared ,

we would like to know

STM32 sending data--->coming in the UART pins--> into Nordic--->Not seen in the Nordic App

yes board is connected laptop using USB.

is the connection fine with these pins

first and second instance same pins..do we need different pins??

Rx and Tx same pins(Pin no6 and pinno 8 as given in the guide.

Any pin changes needed let me know.

I am seeing in the laptop which is connected via USB..should this be removed??

Kindly let me know.

regards

Ravi

RE: UART communication using nRH52840

sravich1 — Tue, 22 Feb 2022 14:06:44 GMT

HI jared,

I am using the first instance of the code ble_peripheral/ble_App_UART/pca10056/ble_app_uart_pca10056_s113.hex

devzone.nordicsemi.com/.../35655.main.c

this is the main file from the ble_peripheral/ble_app/uart/

I have connected to UART pin number 6 and pin number 8

BLE APP(Nordic App/BLE scanner) sending to --->Nordic chip-> send to STM32---not working at STM

STM32 sending data--->coming in the UART pins--> into Nordic--->Not seen in the Nordic App

yes board is connected laptop using USB.

is the connection fine with these pins

first and second instance same pins..do we need different pins??

Rx and Tx same pins

Kindy suggest us one instance to check at a time so that we are clear.

Thanks

Ravi

RE: UART communication using nRH52840

Jared — Tue, 22 Feb 2022 13:53:23 GMT

Hi,

So you are using a second UART instance which is connected to your STM32. What pins does this second instance use? Is the board still connected to the computer through USB? Some code would definitely help ;)

regards

Jared

RE: UART communication using nRH52840

sravich1 — Mon, 21 Feb 2022 09:52:45 GMT

Hi jared,

I have currently compiled for ble_peripheral/ble_App_UART/pca10056/ble_app_uart_pca10056_s113.hex file in my environment.

This is along with pin number 6 and 8 which I have integrated to my STM32 environment.

BLE APP(Nordic App/BLE scanner) sending to --->Nordic chip-> send to STM32---not working at STM

STM32 sending data--->coming in the UART pins--> into Nordic--->Not seen in the Nordic App ,only seen at USB connected to laptop.

to receive at Nordic level from STM32 and sending to Nordic App should be do some extra stuff in the example code??...kindly let me know.

Thanks

Ravi

RE: UART communication using nRH52840

sravich1 — Fri, 18 Feb 2022 17:36:42 GMT

Hi Jared,

1.After testing with ble_app_uart_pca10056_s113.hex(ble_uart_App for Nordic App ) then we connected 6 and 8 pins to STM 32 MCU, we are not seeing any message going to the STM nor coming from STM to nordic.

The messages are seen before we tap i.e till it reaches the pin..any configuration that needs to be done kindly guide us.

2.I also tried with examples/peripheral/UART/uart_pca10056.hex for the third party App..I could see only loop back test here..the nRF connect App could not recognise the BLE nor the third party App.Any idea what needs to be done.

we are more interested to get the integration with STM so that the flow is up in the UART between them.

let me know

regards

Ravi

RE: UART communication using nRH52840

sravich1 — Thu, 17 Feb 2022 17:30:46 GMT

Hi jared,

any update on my previous message...

Thanks

Ravi

RE: UART communication using nRH52840

sravich1 — Wed, 16 Feb 2022 17:33:19 GMT

Hi Jared,

Just to conclude what you have said

1 .If the Bluetooth terminal(PC based) --> use BLE central example and hex directly(change default pin to??)

BLE APP(Nordic App) --> use BLE_App_UART central example and hex directly(pin 6 and 8)

BLE App(Third party)-> use UART_PC_10056 example hex directly(PIN 6 and 8)

is this correct??

2. For flashing hex file use SEGGER for Nordic once we are done with external devices connection ..Any other flash tool kindly suggest

3.I have just integrated UART of STM and also connected to development board..and I am sending some characters from STM but in my App I am always getting ifconfig;echo__END_:$? ..does this mean anything??..these are not my intended characters.

I am sending in a while loop..how do you check in continuous flow of characters in APP nRF connect??

Let me know..thanks

regards

Ravi

RE: UART communication using nRH52840

Jared — Wed, 16 Feb 2022 14:39:51 GMT

Hi,

[quote user="sravich1"]

Bluetooth connected(terminal)--(BLE)------> BLE nordic--(UART)---->STM(Rx to STM)

Bluetooth connected(terminal)<--(BLE)------ BLE nordic<--(UART)<-----STM(Tx from STM)

[/quote]

In this case you'll need to implement the central part on the PC side. The STM will communicate over UART so no need for it to implement the BLE central part. You also need to change the UART pins from the default pin 6 and pin 8.

[quote user="sravich1"]My question to flashing tool is ...can I use any flashing tool such as STlink utility flashing tool in case of STM...like this is there any available flashing tool ..or should we use only SEGGER embedded studio only..let me know.[/quote]

STM is a third party MCU, which we do not support.

[quote user="sravich1"]Also I have one more question...How do we program Nordic BLE chip in our custom board..is this using development board nRF52840..if so how??..any other flash tool..if so which are all the pins from the BLE chip to be brought out to flash..kindly help on this.[/quote]

See this

regards

Jared

RE: UART communication using nRH52840

sravich1 — Wed, 16 Feb 2022 12:54:36 GMT

Hi jared,

Also I have one more question...How do we program Nordic BLE chip in our custom board..is this using development board nRF52840..if so how??..any other flash tool..if so which are all the pins from the BLE chip to be brought out to flash..kindly help on this.

regards

Ravi

RE: UART communication using nRH52840

sravich1 — Wed, 16 Feb 2022 11:16:25 GMT

Hi Jared,

Thanks for your response.

current requirement is the STM (STMicro) board will communicate to Nordic using UART and Viceversa connected to pin 6 and 8.we need to create a hex file so that Nordic receives and Transmits whatever comes to BLE .

Bluetooth connected(terminal)--(BLE)------> BLE nordic--(UART)---->STM(Rx to STM)

Bluetooth connected(terminal)<--(BLE)------ BLE nordic<--(UART)<-----STM(Tx from STM)

These are our intended targets as of now.

so can I use \\nRF5_SDK_17.0.2_d674dde\examples\ble_central\ble_app_uart_c where I can open in SEGGER embedded studio and create an hex file??

or can Use directly ble_app_uart_c_pca10056_s140.hex file in hex folder??..let me know.

My question to flashing tool is ...can I use any flashing tool such as STlink utility flashing tool in case of STM...like this is there any available flashing tool ..or should we use only SEGGER embedded studio only..let me know.

Rest of the things I will change and let you know..thanks

Ravi

RE: UART communication using nRH52840

Jared — Wed, 16 Feb 2022 09:10:14 GMT

Hi,

[quote user="sravich1"]

currently I am using nRF52840 development board connected through UART to our custom board .

I used nRF connect APP to test the Bluetooth and was successful in sending data.

1.My question was can we use the same to test using 3rd party App such as Bluetooth terminal??,

[/quote]

I'm guessing that you're using the ble_app_uart example and not the purely UART hardware example? The ble_app_uart peripheral example implements the NUS service which is a proprietary BLE service from Nordicsemi. This means that this service will not work with third party apps unless they are configured specifically for the NUS service as in the NUS central example.

[quote user="sravich1"]

2. Also cuurently I am using SEGGER embedded studio where I am running Baremetal code to run the hex file.

Is there any other flash tool which we can use ??

[/quote]

The SDK has support for Keil µVision, IAR, GCC

[quote user="sravich1"]3. How do I change the UART speed from 115200 to 9600 ..there is #define should I just use this??[/quote]

See uart_init()

[quote user="sravich1"]4. The development board UART was connected to my USB and this worked fine, to connect to our custom board..Do I need to connect to pin number 6 and 8 to UART of the custom board.??also to change pins should I change in pCA10056.h file ???[/quote]

Not sure I understand this question. The ble_app_uart example receives data over BLE and sends it on UART pins 6 and 8, which is physically connected to the interface chip on the PCB. The fw on the interface chips sends the data from the UART to whatever that is connected on the USB port. You can change the pins that are used for the ble_app_uart module by changing rx_pin_no and tx_pin_no in uart_init(), see the image above.

regards

Jared

RE: UART communication using nRH52840

sravich1 — Tue, 15 Feb 2022 07:17:51 GMT

Hi jared,

currently I am using nRF52840 development board connected through UART to our custom board .

I used nRF connect APP to test the Bluetooth and was successful in sending data.

1.My question was can we use the same to test using 3rd party App such as Bluetooth terminal??,

I also used nRF2.0 but was not able to connect..let me know on this.

2. Also cuurently I am using SEGGER embedded studio where I am running Baremetal code to run the hex file.

Is there any other flash tool which we can use ??

3. How do I change the UART speed from 115200 to 9600 ..there is #define should I just use this??

4. The development board UART was connected to my USB and this worked fine, to connect to our custom board..Do I need to connect to pin number 6 and 8 to UART of the custom board.??also to change pins should I change in pCA10056.h file ???

Let me know

Thanks

Ravi

RE: UART communication using nRH52840

Jared — Fri, 11 Feb 2022 14:03:41 GMT

Hi there,

I'll be handling this case from now.

This case has been going back and forth between different problems. Could you now specify exactly what your problem is, and what you need help with?

regards

Jared

RE: UART communication using nRH52840

sravich1 — Thu, 10 Feb 2022 13:41:39 GMT

Hi Elfving,

Any update Please on 3rd party App I mentioned where I am not seeing any messages when used.

do we need to make any changes in the code..kindly let me know..I have asked in my previous messages.

Thanks and regards

Ravi

RE: UART communication using nRH52840

sravich1 — Wed, 09 Feb 2022 17:10:02 GMT

Hi Elfving,

Any update on my previous message.

regards

Ravi