Compiler/CC2541: USB charging

I suppose you add an GPI from your charger circuit to notify CC2541 to send out BLE notification.

I added that part, took reference from simpleBLEPeripheral Characteristics 4 where NOTIFY is enabled but when I'm reading the value, It is showing nothing

And the GPIO PIN for the USB charger is P0_6

What do you mean "when I'm reading the value, It is showing nothing"?

no nothing. I want to the procedure. How I will achieve this 

// Simple Profile Characteristic 8 Properties
static uint8 simpleProfileChar8Props = GATT_PROP_READ | GATT_PROP_NOTIFY;
// Characteristic 8 Value
static uint8 simpleProfileChar8 = IN_5V;
static gattCharCfg_t *simpleProfileChar8Config;
// Simple Profile Characteristic 8 User Description
static uint8 simpleProfileChar8UserDesp[23] = "Charging Status";

where IN_5V is P0_6

You cannot see simpleProfileChar8 value changes or you have other problem?

I'm not able to see the values at all. No "1" and "0". 

How do you read P0_6 value?

I'm not able to read P0_6 value. That's what I'm asking. How to read?

Claim "uint8 value;" and use "value=P0_6" to read pin status from P0.6 when you need to check its status.

okay let me try

Is there any library to use for the USB like if the USB is connected then I will get noticed in the firmware like USB is connected

Sorry, I am not familiar with USB driver of CC2541.

Hi,

I don't believe we currently offer a USB driver library/example for the CC2541.

Regards,
Michael

Hi Michael,

I am using BLE stack 1.5.1.1 with CC2541. I want to notify the battery level as I am able to read the value and notifications are enabled but I want every 10 seconds battery will notify it's level to the BLE characteristics.

Regards,

Yatin Baluja

Michael Hollister

Do you create a periodic timer that comes every 0 seconds to send notification on your BLE peripheral device?

No

but I created this 

int main()

{
int i=10;
while(i<50)
i++;
}
}

I want to call this on a particular BLE UUID. How to do it ?

Regards,

Yatin Baluja

You can not do this with while-loop.

How to Read and notify the random value ? like I have 10 to 50 random value which I want to get read and notify 

I have random numbers ranging from 10 to 50. Now, I want those numbers to be read and notify in the Bluetooth characteristics with CC2541. 

Try to refer to

any specific section ?

It’s section 5.5 GATT which is most related.

Not working. I did all the things but value is not getting notify. I am able to read the value but notify

Regards,

Yatin Baluja 

Is there any notifyAttrCB like readAttrCB or writeAttrCB ??\

If you look into the code and developer’s guide, you should find SIMPLEPROFILE_CHAR4 is notifiable and can be configured for notifications to be sent to a GATT client device.

I followed the same but notification is not working. Though Read is working. The property for the characteristics is READ and NOTIFY. 

Notifications got enabled but no data is notifying there 

How do you enable notification?

i am using NRFConnect to read and notify the value and in the firmware I enabled the notification similarly in the example code for the CHAR4

In order to enable notifications, the client device must write a value of 0x0001 to the client characteristic configuration descriptor (CCCD) for the particular characteristic. Do you do this?

No. I didn’t know about this. I will do it tomorrow and update you. 

Please also refer to

@YK Chen

After giving 0x0001 value to CCCD, notifications are getting disabled and no value being notified.

using Btool, No ports found error coming up every time

Does your CC2540EMK-USB simulate a virtual COM port on your Windows Device Manager?

I don't think so.....and what about the 0x0001 to CCCD ??

If you don't see virtual COM port simulated by CC2540EMK-USB, it means you don't download HostTest into your CC2540EMK-USB successfully. I think you should setup CC2540EMK-USB and Btool successfully and then you can make notification work after that.

okay

Any link from where I can download and test Host Release with CC2541 ??

I have told you to download and install BLE-STACK 1.5.1. You can find CC2540_USBdongle_HostTestRelease_All.hex under BLE Stack installation folder\Accessories\HexFiles after you install it. I also attached CC2540_USBdongle_HostTestRelease_All.hex for your reference in my previous reply. Have you ever followed my suggestion?

This is what I'm getting after flashing CC2540USB_HostRelease.hex file 

Does your CC2540EMK-USB simulate virtual COM port which is COM2?

I think yes..but Is there any way to confirm ?

You can refer to Btool user guide.

notification not working, I mean no value being notified

What BLE peripheral do you test?