ble-connection power consumption=1mA

RE: ble-connection power consumption=1mA

Stefan Birnir Sverrisson — Tue, 10 Feb 2015 08:37:13 GMT

I am glad you found the cause for the high current consumption. Please update the thread when/if you need further help on the topic. Otherwise accept the answer that you find adequate for your question, by clicking the Accept icon below the voting arrows.

RE: ble-connection power consumption=1mA

kaku — Tue, 10 Feb 2015 06:51:46 GMT

Great thanks for Stefan, also I'm really happy for Daniel to solve your issue !

RE: ble-connection power consumption=1mA

Daniel.Chiu — Tue, 10 Feb 2015 01:50:27 GMT

Yes~the connect interval was not update, I set MCP=>Option->connection interval to 1s, it was work and consumption droped down successfully, I will follow your propose to find out how to update parameter. Thanks a lot and thanks Kaku for your patience.

RE: ble-connection power consumption=1mA

Stefan Birnir Sverrisson — Mon, 09 Feb 2015 14:20:57 GMT

Hi Daniel

I suspect from your discussion with Kaku that the connection parameters have not been updated yet. If you change the connection interval and do not see a change in current consumpiton, then that must be the case. The central device will however set the connection interval when initially connected. If you connect with MCP from a windows PC, then the default connection interval is 20ms which will give you high current consumption. To understand the connection parameter update process, look at this thread. Also, to know the actual connection interval, look at this thread.

This thread will tell you more about 32kHz RC settings for lowest current consumption.

I also aggree with Kaku that you should have a development/evaluation kit to measure the current consumption of your firmware. If you get the same current consumption on your development/evaluation kit, then you know it is not an hardware issue on your custom board, then it is a firmware issue.

RE: ble-connection power consumption=1mA

kaku — Sun, 08 Feb 2015 09:22:26 GMT

According to S110 Softdevice Specification, power profile diagram both advertising and connecting is almost same during idle, but when advertising is about 10uA, the other hand connecting is 1mA. So I think, nRF51 hardware-wise is probably no problem... How about you raising your isisue on Nordic support case ?

RE: ble-connection power consumption=1mA

Daniel.Chiu — Fri, 06 Feb 2015 10:42:53 GMT

I already disable all unneeded peripheral, no led, no uart, no i2c...etc, just maintain BLE needed.
and I also use same code to config "ble_app_hrs",disable button event, they all got same results, adv consumption is uA, connecting consumption=1mA, I notice when I change connect interval value(min=7.5ms to max=4s), the consumption does not change, I guess it's a issue.

RE: ble-connection power consumption=1mA

kaku — Fri, 06 Feb 2015 09:15:45 GMT

Dear Daniel It is strange..., how did you measure power consumption on your board or EK ? For example, ble_app_hrs is blinking LED during advertising, then connected with peer device, LED is always lighting. So LED consumes much more current... If so, how about disables LED port on your board ? Thanks.

RE: ble-connection power consumption=1mA

Daniel.Chiu — Fri, 06 Feb 2015 06:09:26 GMT

No~how can I verify it? I use PCA10000 dongle&MCP to connect. I also try to run on EK board, got the same results....

RE: ble-connection power consumption=1mA

Locky — Fri, 06 Feb 2015 04:38:47 GMT

Have you verified that your preferred Connection Parameters have been accepted by the Central?

RE: ble-connection power consumption=1mA

kaku — Thu, 05 Feb 2015 03:14:14 GMT

Certainly it is quite strange why only connected is huge consumption, so you should compare with nordic EK & SDK code. As my experience, calibration interval would be recommended as 4000ms if use 32kHz RC during connection, it is because of maintaining tolerance within 250ppm. Also disables LED port, Segger J-Link and peripheral UART etc if you use, they cause high consumption. If you use BLE module(not chip) of 3rd party, you may need to check internal schematic configuration in module. I hope you solve this issue, although my advice may be generic things for you.

RE: ble-connection power consumption=1mA

Daniel.Chiu — Thu, 05 Feb 2015 01:09:21 GMT

Thanks! I already read that page and followed step by step, then get this results, so I don't understand why just connect consumption so high, I will try to run code on EK and compare it, thanks again.

RE: ble-connection power consumption=1mA

kaku — Wed, 04 Feb 2015 12:03:42 GMT

"when advertising, idle consumption is about 10uA", it makes sense when using 32kHz RC. Please take a look at this ans.

RE: ble-connection power consumption=1mA

kaku — Wed, 04 Feb 2015 11:41:22 GMT

Hi, Daniel

First of all, I recommend you to check this out how to minimize power consumption for BLE application. I suppose it is useful for you as guide line !

As long as your comments, it looks quite high consumption. If you have already nRF51-DK or nRF51x22 EK/DK boards, you should compare them with your own original board.