CCS/CC1310: POLLING INTERVAL

Pu PiPo

Intellectual 750 points

Part Number: CC1310

Tool/software: Code Composer Studio

what is minimum of polling interval, I want to find smallest value. How can i find it .

over 7 years ago

0 YiKai Chen over 7 years ago

Guru 735685 points

I think you can set it to 100 which mean polling every 100 milli-seconds.

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

if network has more 10 sensor, is it possible?

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

10 sensors should be fine but if you have more, you have to test to know it.

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

Hi YK Chen, thank you for response.
i just test 1 sensor and 1 collector before, but now i use 2 sensor,
they can't join to network together, Can you help me to resolve that problem?

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

Do you mean if you set polling rate to 100 ms and the two sensors can't join to network together?

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

yes,although i changed polling rate up to 10s ,two sensors can't join to network together.

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

If you join two sensors one after one, does it work?

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

no, i joined the first sensor to network and i cant' join the second sensor to network. Sorry about my english,it's so bad

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

Which CC1310 SDK version do you use and do you change anything when you do such test?

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

i use simplelink_cc13x0_sdk_2_20_00_38 , i set an event send message from collector after received config response of sensor

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

If you test original collector/sensor examples, do you see the same issue?

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

i haven't tested with original examples, i'm doing now

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

Hi YK Chen ,
I think i resolved that issue, although the joining isn't stabilize.

I think the polling interval affect to connection of network.

Thank you so much for support

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

Cheers!

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

Oops, Sorry YK Chen =))
Can you help me?
Do you know when a sensor want to join to a network, sensor or collector will config short address for sensor. I want sensor have each short address each time it join to network, but when it dissociate and join back, it use old short address.

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

Short address is assigned by collector and if I am not wrong, application developers cannot assign it.

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

Sorry YK Chen about my lately response, When first sensor connected with collector, the second sensor would provided short address like the first sensor,so the second can't connect to network

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

Short address is assigned by collector. What do you mean " the second sensor would provided short address like the first sensor"?

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

I mean when the second send an association request to collector, collector will send an associate response has short address is short address of first sensor connected. But now, although i didn't change my code, my second sensor can't send association request to collector,i used wireshark to catch packet and i see it.I don't know what happen =))

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

Can you erase the chip and use original collector/sensor example to test again?

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

Hi YK Chen, I tested with the original collector/sensor example . It works perfect.

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

Then, your problem must be caused by your modifications.

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

can you explain to me about polling interval ? I don't know why sensor and collector must have it.

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

Polling is for non-beacon mode since the sensor is sleeping and need polling to collector to know if there is data for sensor to receive.

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

Hi YK Chen,
Have you tested network with 10 sensor is set 100ms polling. I tested 3 sensor is set 800ms, the collector can't send data for sensor with each data request

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

No, I don't test this. Do you use sniffer to check what happens over the air?

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

No ,i just have 4 LP, I use terminal to watch.

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

I suggest you to set up sniffer to check it.

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

I think the polling so small, data request of 3 sensor come to collector at one time ,collector can't send back data for 3 sensor.

0 Pu PiPo over 7 years ago in reply to Pu PiPo

Intellectual 750 points

I understand what polling interval is in sensor example, but in collector example,i see it uses polling interval to set transaction persistence timer, what is transaction persistence timer, Can you explain it to me?

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

In collector example, it doesn't need have polling interval. Why do you think it needs?

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

Thank YK Chen, I saw it in Configuration Parameters table of Ti15.4 stack

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

I believe collector doesn't use it.

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

do you know how to resolve config issue ,2 data request from 2 sensor are send to collector but collector just send back data for 1 sensor

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

How fast does your collector send data to sensors?

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

average is 0,08s, data 80bytes

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

If your polling rate is 800 ms and collect sends data in 80ms interval with 80 bytes, this is to fast and not feasible. We usually don't send data faster than polling rate.

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

i saw 80ms, in sniffer,i don't set it.the collector send data when it recive data request from sensor

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

That's MAC ack of data request.

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

I set when sensor send data request,collector will send back data packet

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

I couldn't understand your question.

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

I want 3 sensors get data from collector with period is smallest, After a data request ( use polling interval )of each sensor, collector will send back a data packet. But my issue is although i set polling up to 10s, 3 sensors can't get data together.

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

Basically, application of collector deosn't know sensor does polling. How do you do this in your code?

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

I modify pollIndCB method in collector.c

0 YiKai Chen over 7 years ago in reply to Pu PiPo

Guru 735685 points

If you use a periodic event to send packets to sensors instead of doing it in pollIndCB method, does it work?

0 Pu PiPo over 7 years ago in reply to YiKai Chen

Intellectual 750 points

I just tested it with 2 sensor, it work .I think i will try to use a periodic event to send packet to collector and collector will response a packet.

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CCS/CC1310: POLLING INTERVAL