[[computemodul4_temperature_test]]

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computemodul4_temperature_test [2021/05/03 00:41]
wf68spef
computemodul4_temperature_test [2021/05/17 00:59]
wf68spef
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 PI Compute Board: PI Compute Board:
   * RPI-CM4Lite-R1-3:​ https://​www.berrybase.de/​raspberry-pi/​raspberry-pi-computer/​compute-modules/​raspberry-pi-compute-module-4-4gb-ram-lite-wlan-43-bt   * RPI-CM4Lite-R1-3:​ https://​www.berrybase.de/​raspberry-pi/​raspberry-pi-computer/​compute-modules/​raspberry-pi-compute-module-4-4gb-ram-lite-wlan-43-bt
 +       * With Heatsink (https://​www.pollin.de/​p/​joy-it-kuehlkoerperset-fuer-raspberry-pi-810822)
 Board: ​ Board: ​
   * Wavesahre CM4-IO-BASE-B https://​www.waveshare.com/​wiki/​CM4-IO-BASE-B   * Wavesahre CM4-IO-BASE-B https://​www.waveshare.com/​wiki/​CM4-IO-BASE-B
Line 15: Line 16:
   * PI4 Internal CPU Thermometer   * PI4 Internal CPU Thermometer
   * Multimeter: AM-550-EU PTC Temperature for Wifi Temperature Measurements   * Multimeter: AM-550-EU PTC Temperature for Wifi Temperature Measurements
 +      * The temperature of the wifi module by placing the ptc at the heatsink of the wifi module
 +      * Not highly accurate, but should give a indication
 +Lab Power source
 +  * Quatpower LN-3003 ​
  
 ====== Software ====== ====== Software ======
  
-==== Reduced ​power usage by disabling various ​CM4 modules ​====+==== Reduce ​power usage of CM4 ====
  
 **no bluetooth** **no bluetooth**
Line 48: Line 53:
   * config.txt   * config.txt
   * dtparam=audio=off   * dtparam=audio=off
 +
 +**no USB**
 +  * disabled by default @ CM4 for powersaving
 +  * https://​www.jeffgeerling.com/​blog/​2020/​usb-20-ports-not-working-on-compute-module-4-check-your-overlays
  
 ==== Testsoftware ====  ==== Testsoftware ==== 
Line 93: Line 102:
 ====== Tests ====== ====== Tests ======
  
-**Test 1 - 2 cameras**+==== Test 1 - 2 cameras ​==== 
  
 {{ ::​IMG_20210502_160159.jpg?​400 |}} {{ ::​IMG_20210502_160159.jpg?​400 |}}
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 Using the power usage in Wh a **mean power of ~1.8W** is needed when using 2 cameras. Using the power usage in Wh a **mean power of ~1.8W** is needed when using 2 cameras.
  
-**Test 2 - 2 cameras + Wifi**+==== Test 2 - 2 cameras + Wifi ==== 
  
 {{ ::​IMG_20210503_000548.jpg?​400 |}} {{ ::​IMG_20210503_000548.jpg?​400 |}}
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 ^ Testmode ​     ^ Time (h) ^ Power usage (Wh)  ^ Power usage (W) ^ CPU Temp (°C) ^ WIFI Temp (°C) ^ ^ Testmode ​     ^ Time (h) ^ Power usage (Wh)  ^ Power usage (W) ^ CPU Temp (°C) ^ WIFI Temp (°C) ^
 | IDLE          |  0:00    |   ​- ​          ​| ​  ​1.7 ​        ​| ​ 43.8           ​| ​ 30           | | IDLE          |  0:00    |   ​- ​          ​| ​  ​1.7 ​        ​| ​ 43.8           ​| ​ 30           |
-| use 2 cameras |  0:00    |   ​- ​          ​| ​  ​2.4 ​        ​| ​ 43.8           | 30           | +| use 2 cameras |  0:00    |   ​- ​          ​| ​  ​2.4 ​        ​| ​ 43.8           ​| ​ 30           | 
-| WIFI          |  0:00    |   ​- ​          ​| ​  ​2.65 ​        ​| ​ 43.8          | 30           |+| WIFI          |  0:00    |   ​- ​          ​| ​  ​2.65 ​        ​| ​ 43.8          |  30           |
 | use 2 cameras + WIFI |  0:00    |   ​4.83 ​      ​| ​  ​3.2 ​          ​| ​ 43.8           ​| ​  ​30 ​          ​| ​ | use 2 cameras + WIFI |  0:00    |   ​4.83 ​      ​| ​  ​3.2 ​          ​| ​ 43.8           ​| ​  ​30 ​          ​| ​
 | use 2 cameras + WIFI |  0:15    |   ​5.666 ​      ​| ​  ​3.2 ​          ​| ​ 52.0           ​| ​  ​48 ​          ​| ​ | use 2 cameras + WIFI |  0:15    |   ​5.666 ​      ​| ​  ​3.2 ​          ​| ​ 52.0           ​| ​  ​48 ​          ​| ​
 | use 2 cameras + WIFI |  0:30    |   ​6.52 ​      ​| ​  ​3.2 ​          ​| ​ 53.0           ​| ​  ​50 ​          ​| ​ | use 2 cameras + WIFI |  0:30    |   ​6.52 ​      ​| ​  ​3.2 ​          ​| ​ 53.0           ​| ​  ​50 ​          ​| ​
  
-Using the power usage in Wh a **mean power of ~3.38W** is needed when using 2 cameras + wifi.+Using the power usage in Wh a **mean power of ~3.38W** is needed when using 2 cameras + wifibroadcast. 
 + 
 +==== Test 3 - Wifi ====  
 + 
 +As it turned out that the radio power amplifier was not connected in test #2, i reran the test. Power is provided by the laboratory power source @ 12.3V + DCDC Converter @ 5V for the cm4 board. NOTE: The sligtly incread Idle power usage is due to the additional DCDC converter, and the powermeasurement BEFORE this converter. 
 + 
 +^ Testmode ​     ^ Time (h) ^  Power usage (W) ^ CPU Temp (°C) ^ WIFI Temp (°C) ^ 
 +| IDLE |  0:00    | 2.3      |  34.5          |  27           | 
 +| WIFI |  0:01    | 5.78      |  36.5          |  29           | 
 +| WIFI |  0:11    | 5.78           ​| ​ 46.7           ​| ​  ​58 ​          |  
 +| WIFI |  0:21    | 5.78           ​| ​ 51.0           ​| ​  ​62 ​          |  
 +| WIFI |  0:30    | 5.78           ​| ​ 51.0           ​| ​  ​63 ​          |  
 + 
 + 
  
  
  • computemodul4_temperature_test.txt
  • Last modified: 2021/05/17 01:00
  • by wf68spef