I have Da14583 Dialog iot board and MUARATA P2ML 3656 LBCA2HnZYZ Dev board (DA14580) .,how to check IOT board (Battary operating) power consumption using Murata Dev Board(Power profiler)
I am not aware about the Murata board pin out but i suppose if you go ahead and supply the external device from the Murata board (supply your custom board from the rail that goes through the current measurement circuit - since the Murata supports teh Power Profiler) you will be able to use the power profiler with any custom design.
We were using custom board DA14583 as master and DA 14580 as slave. We want to predict the battery life of the modules. We were using 3.3v coin cell battery(CR2032). We have also used power profiler and have the values with us. Is there any standard formula to calculate the battery life with the values i am able to see from the power profiler?
There is no standard formula in order to make the approximation of the power consumption, you can measure how much the device comsumes when it is awake and how much when the device sleeps (this should be a standard number, since the device consumes a fixed value when its sleeping depending on the sleeping mode), in order to have the amount of charge consumed in an interval. So you can check from the power profiler the time that the device stays awake and the mA that you device consumes when its awake and add to that the theoritical consumption when the device is in sleep mode so that you can calculate the charge.
Since you know the charge consumed in an interval, and how much you battery can provide in mAh (so you will able to calculate the charge of your battery) then you can calculate how long the device will last with the given battery.
We are using custom board DA-14583 as master and DA-14580 as slave. And also we are using your DSPS code for both the host and device. We are putting the device(slave) to extended sleep mode. We have read in your data-sheet that, during sleep the slave consumes roughly around 1.2 micro ampere. We are checking the current consumption through power profiler. During sleep time the average current comes around 0.5 milli amperes. Why we are not able to get that expected 1.2 micro amperes during sleep. What might be the problem?..
The device consumes around 1.4uA when is in extended sleep, that means no BLE activity and the device stays in permanent sleep no Tx or Rx, please check if theres indeed no activity from the power profiler, and if you dont see any activity verify the power consumption via a DMM when the device is sleeping. If you can't see approximatelly the indicated power consumption value then either there a leakage on your board, or the device doesn't fall in the sleep mode that you defined. The DSPS changes the sleep mode dynamically when its time to go to sleep, perhaps you ve done any modifications that interfere with that mechanism.
We have tested with a digital multimeter, during sleep we are able to see around 2uA mostly. Since we are not able to get the average current consumed during sleep in multimeter, we went for power profiler but there the average current reaches around 0.4 milli ampere which is very high when compared with the instantaneous values from the multimeter. How can we check the exact average current consumed during sleep?
The DMM indication is more reliable than the measurements that you get with the power profiler, so since during sleep you get 2uA that means that the device is sleeping. I am not sure i get the question, since the device is constantly sleeping and by measuring the current shows you 2uA, you can consider this value as the average consumption when the device sleeps, there isn't going to be much deviation between successive values when the device is constantly sleeping. Also the power profiler isn't able to get near the micro scale.
Hi prasanth,
I am not aware about the Murata board pin out but i suppose if you go ahead and supply the external device from the Murata board (supply your custom board from the rail that goes through the current measurement circuit - since the Murata supports teh Power Profiler) you will be able to use the power profiler with any custom design.
Thanks MT_dialog
Hi dialog,
We were using custom board DA14583 as master and DA 14580 as slave. We want to predict the battery life of the modules. We were using 3.3v coin cell battery(CR2032). We have also used power profiler and have the values with us. Is there any standard formula to calculate the battery life with the values i am able to see from the power profiler?
Hi prasanth,
There is no standard formula in order to make the approximation of the power consumption, you can measure how much the device comsumes when it is awake and how much when the device sleeps (this should be a standard number, since the device consumes a fixed value when its sleeping depending on the sleeping mode), in order to have the amount of charge consumed in an interval. So you can check from the power profiler the time that the device stays awake and the mA that you device consumes when its awake and add to that the theoritical consumption when the device is in sleep mode so that you can calculate the charge.
Since you know the charge consumed in an interval, and how much you battery can provide in mAh (so you will able to calculate the charge of your battery) then you can calculate how long the device will last with the given battery.
Thanks MT_dialog
Hi Dialog,
We are using custom board DA-14583 as master and DA-14580 as slave. And also we are using your DSPS code for both the host and device. We are putting the device(slave) to extended sleep mode. We have read in your data-sheet that, during sleep the slave consumes roughly around 1.2 micro ampere. We are checking the current consumption through power profiler. During sleep time the average current comes around 0.5 milli amperes. Why we are not able to get that expected 1.2 micro amperes during sleep. What might be the problem?..
We are putting the device to sleep like,
app_easy_gap_advertise_stop();
arch_ble_ext_wakeup_on();
Thank you
Hi prasanth,
The device consumes around 1.4uA when is in extended sleep, that means no BLE activity and the device stays in permanent sleep no Tx or Rx, please check if theres indeed no activity from the power profiler, and if you dont see any activity verify the power consumption via a DMM when the device is sleeping. If you can't see approximatelly the indicated power consumption value then either there a leakage on your board, or the device doesn't fall in the sleep mode that you defined. The DSPS changes the sleep mode dynamically when its time to go to sleep, perhaps you ve done any modifications that interfere with that mechanism.
Thanks MT_dialog
Hi Dialog,
We have tested with a digital multimeter, during sleep we are able to see around 2uA mostly. Since we are not able to get the average current consumed during sleep in multimeter, we went for power profiler but there the average current reaches around 0.4 milli ampere which is very high when compared with the instantaneous values from the multimeter. How can we check the exact average current consumed during sleep?
Thank you.
Hi prasanth,
The DMM indication is more reliable than the measurements that you get with the power profiler, so since during sleep you get 2uA that means that the device is sleeping. I am not sure i get the question, since the device is constantly sleeping and by measuring the current shows you 2uA, you can consider this value as the average consumption when the device sleeps, there isn't going to be much deviation between successive values when the device is constantly sleeping. Also the power profiler isn't able to get near the micro scale.
Thanks MT_dialog