What do I need to know to add mesh functionality into a normal BLE application ?
We currently working on a tutorial on how to merge a mesh application into our nRF5 SDK BLE example. We will update this thread when we finish. For now we provide a quick example so that you can follow.
Mesh stack operates on the timeslot feature provided by the same softdevice used on the nRF5 SDK. So it requires little modification in the Mesh stack to be integrated into a normal BLE example. In fact only modification in the application code needed.
Attached here is an example that we merge the light control server example into ble_app_uart.
How to test:
Permanent storage of provisioning and configuration is not stored on flash. After reboot, the device would require provisioning again. We are working to fix this. The reason is the flash management on 2 SDKs are not the same and can conflict.
Only S132 v5.0, PCA10040, and SES is supported in the example for now.
Connection interval of BLE application have to be changed >100ms to give enough time for mesh
How to integrate into your own application:
Include all the source file from Mesh example
Include all header folders from Mesh example in Project Option -> Common -> Preprocessor -> Include Directories
Include Preprocessor Definitions in mesh example ( same setting tab as above).
Customize the simple_hal.c to not use GPIOTE_IRQHandler() as it conflicts with the gpiote driver in the SDK
Set PERSISTENT_STORAGE to 0
Edit main.c to add mesh init functions and define.
Add nrf_mesh_evt_handler to SOC observer list with NRF_SDH_SOC_OBSERVER for example:
void nrf_mesh_evt_handler(uint32_t sys_evt, void * p_context)
NRF_SDH_SOC_OBSERVER(m_nrf_mesh_observer, 0, nrf_mesh_evt_handler, NULL);
Add nrf_mesh_on_ble_evt((ble_evt_t *)p_ble_evt); to BLE observer list with NRF_SDH_BLE_OBSERVER; or just simply add it into ble_evt_handler(). (Optional)
Example for SDK v14.2 and Mesh v1.0, nRF52840 and nRF52832:
Light switch client + ble app uart . Send BLE command on NUS service with '0' '1' '2' '3' as button press. Copy mesh SDK into mesh_sdk folder inside nRF5 SDK folder.
Light switch server + ble app proximity
I would like to combine ble_app_uart with light_switch_client for PCA10056 or PCA10040.
So I did example for PCA10056 using your advices but I get a few similar errors like: and I dont know where I did mistake.
Could you help me with this problem? I have tried many times but I do not find solution.
I enclose my example. I would be grafefull if you could help me.
Also I have tried to do example for PCA10040, it compiles without errors but it does not work. Neither mesh nor ble.
Seems that NRF52_SERIES is not defined. Please add that into Preprocessor Definitions in Project Option -> Common -> Preprocessor
I merged ble_app_uart and light_switch, sometimes works, sometimes it does not work. I have to reset my DK a few times and it starts working. I turned on RTT Viewer and saved logs from client.
I connect client with smartphone (nRF Uart App) and get error:
When I send 3 times message from app to client I get information that: Cannot send.Device is busy:
I have to reset a few times becasue I still get message that Device is busy and it does not work.
After a few resets everthing is good.
I have to reset many times and it is very problematic.
Do you have any ideas?
Have you made sure you have the connection interval (with the phone) >100ms . This is to make sure mesh stack have enough time domain to function. Please try to test first without any BLE activity, no advertising, no connection. Try to test and make sure provisioning works fine, client can send data to server.
I suspect the short connection interval is the culprit here.