Enable temp and accel

RE: Enable temp and accel

CE — Fri, 29 Mar 2019 09:49:01 GMT

If this thread is closed (got an email saying that) then I just want to thank you guys for your answes, it tought me a lot about beacons. I'm putting these Wellcore w912 aside and wait for new beacons with 52832s and hopefully the sensors I'm more interrested in; temperature and humidity.

RE: Enable temp and accel

CE — Thu, 28 Mar 2019 20:06:46 GMT

OK, I'm buiding an app that use temp and accel, the only two beacons I have at the moment are W912s from Wellcore, can I erase Wellcores firmware and replace it with something standard that at leats give me internal temperature?

RE: Enable temp and accel

awneil — Thu, 28 Mar 2019 18:16:17 GMT

The point is, it's all down to software.

If Wellcore have created software which says it has a "temperature", then nRFConnect will display that.

There is no way for nRFConnect to know whether the report is purely fictitious!

Again, you really need to discuss this with Wellcore.

If you cannot get adequate support from Wellcore, then consider an alternative manufacturer.

RE: Enable temp and accel

CE — Thu, 28 Mar 2019 17:56:13 GMT

You lost me: "I find it strang that NRF Connect finds them and shows values " you:"Not strange at all - that's the whole point of the BLE standardised attributes and services!"

So it's standard to show something that does not exist? So why don't humidity turn up or other sensors?

RE: Enable temp and accel

awneil — Thu, 28 Mar 2019 14:15:59 GMT

[quote userid="78371" url="~/f/nordic-q-a/45370/enable-temp-and-accel/178918"]I find it strang that NRF Connect finds them and shows values [/quote]

Not strange at all - that's the whole point of the BLE standardised attributes and services!

This allows a device to advertise that it has a "temperature" facility - while being completely independent of how that is implemented.

https://www.bluetooth.com/specifications/gatt/generic-attributes-overview

https://www.bluetooth.com/specifications/gatt

It's a bit like USB: when you plug a USB device into your PC, it identifies it through the standard USB processes & protocols

[quote userid="78371" url="~/f/nordic-q-a/45370/enable-temp-and-accel/178918"]So why cant I get values from temp, I guess temp is what the chip need to shut down if it's to hot or cold[/quote]

Again, that's a question for Wellcore.

RE: Enable temp and accel

ketiljo — Thu, 28 Mar 2019 14:07:22 GMT

The firmware strongly depends on the HW, what GPIO lines the sensors are connected to, type of sensors. Nordic delivers the softdevice (Bluetooth stack) and a SDK that can be used to develop the FW. In this case, Wellcore has taken the SDK and the softdevice and made FW that makes the nRF51822 act like a beacon. You need to ask Wellcore how they intend this to be used.

RE: Enable temp and accel

CE — Thu, 28 Mar 2019 12:29:24 GMT

Actually the shiny tnig seems to be an on/off switch. But good news from Wellcore, they asked for a picture of the chip and when they had studied it they told me that temp and accel is not on my chip. I find it strang that NRF Connect finds them and shows values and even stranger that they could see that I dont have a temp-sensor, you said it is always there on 51822, right. So why cant I get values from temp, I guess temp is what the chip need to shut down if it's to hot or cold?

RE: Enable temp and accel

CE — Wed, 27 Mar 2019 09:27:27 GMT

I'm just learning. Acctually I can "see" the accel sensor on the chip/board, it's that rectangular shiny thing close to SW1?

I didn't know that Wellcore has their own software, or firmware. The beacon has nRF5_SDK_11.0.0_89a8197 as "Software Revision String".

I thought that the beacon came with some kind of function that answered an app for example when asked for data, also sending at intervalls defined through some outer software. But you are saying that each company has their own firmware on the chip and that is what answers the app for example Lightblue. And they can lock the sensors with their firmware.

Isn't there a enable code in the standard firmware, if so why would they want to change it?

I have tried to get the information from Wellcore, I even sent a video showing my beacons, but so far I haven't got any info from them. Still hoping. Otherwise, the alternative is to remove the firmware and put my own. And I suppose you have some standard firmware I can use?

I'm building an app that use the temp and accel, it's my first shot with a beacon. I appreciate all help I can get.

RE: Enable temp and accel

awneil — Tue, 26 Mar 2019 20:47:32 GMT

Yes, the nRF51822 has an internal temperature sensor.

But you said you could "see the temp and accel sensors" - so they must be external to the nRF chip.

Either way, if you're talking about accessing these via the software provided by Wellcore in their product, you will need to ask Wellcore about that - it is their own custom software; nothing to do with Nordic.

Or are you talking about erasing the Wellcore software, and writing your own ... ?

RE: Enable temp and accel

CE — Tue, 26 Mar 2019 18:45:16 GMT

Temperature is on NRF51822, right?

RE: Enable temp and accel

ketiljo — Tue, 26 Mar 2019 13:26:06 GMT

Please ask the manufacturer of the product for advice