NUS connection problem

RE: NUS connection problem

Jared — Fri, 27 Nov 2020 13:28:04 GMT

Hi,

[quote user="burakcanfazla"]Is it cause of sending data length?[/quote]

NRF_ERROR_INVALID_LENGTH is usually returned when you provide incorrect length of a parameter such as a buffer.

[quote user="burakcanfazla"]

connection handle is:

00> <info> app: Disconnected. conn_handle: 0x0, reason: 0x8

[/quote]

You need to debug your code more thoroughly. I can tell based on the error log from your original problem statement that connection handle is invalid when you call ble_nus_c_string_send(). I can also see that you call this function two places in your code. I suggest that you actually check what the connection handle is, and if it has been properly assigned before you call ble_nus_c_string_send().

regards

Jared

RE: NUS connection problem

brkcnfzl — Fri, 27 Nov 2020 07:53:05 GMT

00> <error> app: Failed sending NUS message. Error 0x9.
00> <error> app: ERROR 9 [NRF_ERROR_INVALID_LENGTH]

Is it cause of sending data length?

connection handle is:

00> <info> app: Disconnected. conn_handle: 0x0, reason: 0x8

RE: NUS connection problem

Jared — Fri, 27 Nov 2020 07:41:12 GMT

Hi,

As the error message describes it, the central is calling ble_nus_c_string_send() with an invalid connection handle. Set a breakpoint where you call ble_nus_c_string_send() and check what the connection handle is.

regards

Jared