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computemodul4_temperature_test [2021/05/03 01:02] wf68spef |
computemodul4_temperature_test [2021/05/17 01:00] (current) wf68spef [Test 3 - Wifi] |
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* The temperature of the wifi module by placing the ptc at the heatsink of the wifi module | * 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 | * Not highly accurate, but should give a indication | ||
+ | Lab Power source | ||
+ | * Quatpower LN-3003 | ||
====== Software ====== | ====== Software ====== | ||
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* 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 ==== | ||
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Using the power usage in Wh a **mean power of ~3.38W** is needed when using 2 cameras + wifibroadcast. | Using the power usage in Wh a **mean power of ~3.38W** is needed when using 2 cameras + wifibroadcast. | ||
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+ | ==== 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 | | ||
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