Sending hexidecimal sensor data over BLE

RE: Sending hexidecimal sensor data over BLE

Jared — Mon, 22 Mar 2021 09:27:57 GMT

The max data length that can transferred over BLE with the NUS module is defined as:

BLE_NUS_MAX_DATA_LEN (NRF_SDH_BLE_GATT_MAX_MTU_SIZE - OPCODE_LENGTH - HANDLE_LENGTH), where OPCODE_LENGTH is 1 and HANDLE_LENGTH is 2. NRF_SDH_BLE_GATT_MAX_MTU_SIZE is defined in the your sdk_config.h file.

RE: Sending hexidecimal sensor data over BLE

NikTheNordicUser — Fri, 19 Mar 2021 09:22:00 GMT

what is the maximum buffer size that the ble_nus_data_send can send at once please?

RE: Sending hexidecimal sensor data over BLE

NikTheNordicUser — Fri, 19 Mar 2021 09:20:56 GMT

i have solved the issue the problem was that i was providing a value for legnth. it had to be a pointer

RE: Sending hexidecimal sensor data over BLE

Jared — Fri, 19 Mar 2021 08:50:35 GMT

What is returned by ble_nus_data_send()? Also, what datatype is the Send_Buffer[] ? Is it a uint8_t array? If so, then you can omit the (uint8_t*) and just pass Send_Buffer as a parameter

RE: Sending hexidecimal sensor data over BLE

NikTheNordicUser — Wed, 17 Mar 2021 16:38:21 GMT

this is wat im trying to do, i am getting 6 register results and storing them in an uint8_t array called send#-buffer and i would like to send this using the ble_nus but when i run this nothing is sent

RE: Sending hexidecimal sensor data over BLE

NikTheNordicUser — Wed, 17 Mar 2021 14:40:31 GMT

i am trying to use the ble nus data send but nothing is being send

RE: Sending hexidecimal sensor data over BLE

NikTheNordicUser — Wed, 17 Mar 2021 14:37:40 GMT

i am using the ble uart example with SPI pheripheral and in sending the data through ble and have another nodric using the ble uart client examples to output the data in uart

RE: Sending hexidecimal sensor data over BLE

NikTheNordicUser — Wed, 17 Mar 2021 14:35:00 GMT

spi perihperal and im storing the registers in an array, may you plese provid me with some code to help me pls as ive tried many methods and couldnt manage

RE: Sending hexidecimal sensor data over BLE

Jared — Wed, 17 Mar 2021 14:26:52 GMT

Hi,

Are you using the SPIM or SPI peripheral?

[quote user=""]hence i am trying to remove this and send the hexadecimal registers directly as an array of 6 bytes (1 byte per register) such that in the SPI handler it will send the data and during the ble_send it will be gathering another set of data from the sensor. [/quote]

Sending hex data can be done by using the NUS module, ble_nus_data_send() takes in a uint8_t array of length p_length. Which means that the functions takes in a byte array and sends it over BLE. See the ble_app_uart example if you need an example on how to use the NUS module.

regards

Jared