PSoC™ 4 Forum Discussions

Hello,

For a new project, i need to develop a Bluetooth HID Keyboard, so i searched for the good controller.

I found BCM20735 and BCM20733 are good for making HID keyboard, to connect directly a keyboard matrix.

The problem is that i can't find much help for these products like a developement kit, hardware and routing preconisation and, more important, code example to scan a matrix and get a HID Bluetooth keyboard recognized by the host.

Many thanks in advance for your help,

Best Regards,

Benjamin Recoules

Hello, This is Gaurav. I'm trying to collect the reading of LDR on PSOC4-042. Now I'm able to collect the data in a variable. But don't know how will i send it over.

1.Please guide me how can i send a data stored in a variable to a smartphone via BLE.?

Thank You,

Hello,

I have iOS and Android apps for monitoring many, many ble sensors in an industrial environment.  The iOS/Android app automatically connects, reads and logs the characteristic values of each ble sensor that is within range and continues to automatically log ble sensors as the iOS or Android device moves through out the facility and new ble sensors come into range.  Is there any way I can encrypt the data coming from each ble sensor without having to manually enter a pairing password for each ble sensor that comes within range?  Can pairing be done automatically with one, or a few passwords which are stored on the iOS or Android device?  Is there another data encryption method not requiring pairing?

Thanks.

After much debugging, I've finally stumbled upon what was causing parts of my code to not operate correctly all of the time.  It seems that when I write to flash on my 4100 BLE chip, it was causing two issues:

1.  For a brief period after the write to flash, my UART TX/RX was getting screwed up and I was seeing a buch of gibberish on my terminal screen.  I believe this was because the clock driving the UART, which is derived from the HFCLK, was being impacted, which meant my baud rate was out of whack briefly

2.  Also, for a brief period after the write to flash, my PWM signal, which was also driven off a clock signal derived from the HFCLK, was in turbo mode and seemed to be operating at about 10 times the frequency I was wanting it to.

In both cases, my HFCLK was derived from the IMO.

Is this sort of behaviour to be expected when writing to flahs?  I'm not sure how stable the IMO is supposed to be and what's the best way to get around it.  In the short term I'm just shifting my write to flash code to a point in time where the UART and PWM aren't being used, or aren't critical to operation of the hardware, but I'd like to understand what the root cause is and how I can get around it.

Can anyone provide any comments/advice?

Cheers,

Mike

I understand a few stipulations for simultaneously scanning and advertising, and also broadcasting while in a connected state, such as while connected, broadcasts must be non-connectable, undirected advertisements, however, while scanning, advertisements can be of any type.  Also, as far as API calls, starting advertisements must happen before starting up scanning.  I do have some related questions involving the connected/broadcasting function that isn't mention in the docs though, if anyone can help:

1.  I noticed that there is no "NON_CONNECTABLE_DIRECTED_ADV".  The non-connectable portion is understandable, but what if, for example, I wanted a connected device's broadcast to only reach a specific non-connected device?  How would that be accomplished?

2.   If directed broadcasting isn't possible, do these broadcast advertisements have a scan response packet? 

     If so, does filtering apply?  I figured that if I can't direct the advertisement, I could filter the scan response packet from everything but the defined devices.

3.  This one relates to both Scanning/Advertising and Connected/Broadcasting: Can you dynamically update these advertisements using CyBle_GapUpdateAdvData while scanning or connected, or would you need to be in a disconnected, or non-broadcasting, state, update, then restart?