I am measuring the energy consumption of the RedCap module RG255C-GL module. The module is currently placed on a 5G M2 EVB board. According to the user guide, it has 5 steps.
Disconnect or remove R0145 and R0146.( these pins are changes in my board, these are R1085, R1086)
Set the power switch (S0201) to the PWR_ON or PWR_OFF side, and set PWRKEY (S0101) to the ON side. Please note that you will get the current consumption of the module in sleep mode at USB 3.0 when S0201 is on the PWR_ON side and that in sleep mode at USB 2.0 when S0201 is on the PWR_OFF side. ( These pins are the same)
Insert an applicable module. (placed)
Connect an external power supply to the oval vias marked by the reference designators, VCC and GND, on the edge of the board to power the module independently. Then turn on the external power supply, and the module will turn on. ( I have connected with V=5v and I=3amp)
Connect the USB interface (J0601) to the USB 3.0 interface of a PC.(connected)
Send AT+QSCLK=1 and AT+CFUN=0 to enable the module to enter sleep mode. After the module enters sleep mode, you can test the current consumption from the external power supply. (followed)
How can I do step 1, what does it mean to disconnect or remove the pins?
I have followed all the other steps but I want to confirm whether these steps are correct or not because the current measurement on the DC analyzer is not changing, it is fixed to 0.47 mA even after putting the modem to sleep mode.
My ultimate aim is:
to measure the energy consumption of the module independently
to measure the energy consumption of modules at different statuses, e.g., connected, disconnected, to network, and under UL and DL measurement.
Dear @danyal_khattak
For sleep mode, please confirm host’s USB enters suspended mode. Or after execute AT command, you can disconnect USB and test again.
Hi thankyou for the response. Is this a new AT command manual. Because the manual i have dont have this type of explanation. If so, can you share if is not solely for Quectel internal use.
Hi, after modifying the UE, removing the resistors for measuring the current consumption, the modem is dropping connection and reconnect again? What could be the possible issues? How to fix?
Yes the module consume 3.8V. I am providing that much voltage but it drop connection. Wanted to know if i have to supply higher voltage but afraid it will break down.
RG255CGL is my modem.
No i removed exactly the same resistors O ohms. I will try with another board and will let you know. But if come up with the solution that from oval vias how much voltage should i apply.
sorry for the delayed response. I have a board 5G M2 EVB board. There are resistor R1085 and R1086 and it is written there that these are NM for current test. Given that the resistor are removed, the module rating voltage is 3.7V. I might supply high voltage due to which the module is malfunctioned. Now my query is how much voltage and current should be supplied via Oval vias this is where I need help. I don’t want to exceed the voltage and current from the external power supply. I followed all the steps from user guide of 5G M2EVB for modification.
Hi Silvia,
I have done the modification and the module is working as expected.
Now i have to measure the energy consumption in different RRC stats, IDLE , INACTIVE and CONNECTED.
I need help in puttting my RedCap UE to the above stats. Well in connected mode we will have active data transmitt and receive, but how about the IDLE and inactive. Because when the UE is turned on it has a sim and it tries to connect to the network, this is where i am confused that in IDLE stat it should not be in a stat where it tries to establish any active connection. So how to see that in my modem.
Does CFUN command will help me?
I have the following timers set in network config file.
TIMERS:
t300: 1000
t301: 1000
t310: 1000
t311: 30000
n310: 1
t319: 1000
Okay,
I put my modem into sleepmode using these commands
at+qsclk=1 and at+cfun=0, I remove USB then connect for able to see the paging messages.
There are two things, one is that when we do not have any active transmission, the network will move the the device to either RRC idle or inactive based on timers. When the AT commands manual says the the device will be in sleep ,and will monitor paging messages.Is this the paging messages from the network or is this the uplink communication from UE to network confirming to the network I am still here. Sorry for my vague understanding but I would appreciate comment on sleep mode.
Second thing is the CEDRX mode, there should be agreement between UE and network about the paging messages, how to configure this mode?
Dear @danyal_khattak
The paging message is from base station, not from module, it only monitors this.
You can use at+cedrxs to configure edrx, it is 3GPP standard AT command.
Hi, i have one question regarding RedCap since i am working parallel on 5G NR and 5G RedCap.
I can change the BW from 20 to 10 MHz in FDD mode but not in TDD. Is it fixed to 20 MHz in TDD? or my understanding is not correct. Secondly can i further reduce the bandwidth to 5MHz??
Dear @danyal_khattak
Each band has corresponding configuration, it depends on base station. FDD and TDD are different mode.
It should be to confirm whether device support 5MHz.
