wiki:ibts:power_management_ibts
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wiki:ibts:power_management_ibts [2020/03/25 17:11] dlr |
wiki:ibts:power_management_ibts [2020/03/25 17:12] (current) dlr |
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| On all versions, you can also use the following tool: | On all versions, you can also use the following tool: | ||
| - | <code bash> | ||
| - | root@klk-lpbs:~# adc | ||
| - | VDD_CORE=1372mV | ||
| - | NVCC_DRAM=1354mV | ||
| - | 3V3_FDP=3283mV | ||
| - | NVCC_3V3=3288mV | ||
| - | VIN_9V=48435mV | ||
| - | VCC_5V=5008mV | ||
| - | VPOWER=9139mV | ||
| - | VPORT_MEAS=48435mV | ||
| - | </code> | ||
| - | ====== Wirnet™ iBTS: Power supply management ====== | ||
| - | The Wirnet iBTS gateway can be powered with an Ethernet cable (PoE injector) or/and an auxiliary power supply (solar panel, battery). | ||
| - | When both PoE **and** external power supply are plugged, the gateway uses the highest voltage available. | ||
| - | |||
| - | <note important> | ||
| - | The VIN_9V corresponds to VIN_POE.\\ | ||
| - | * **POE power supply** - VIN_9V has the POE Value.\\ | ||
| - | * **External power supply** - VIN_9V has the external power supply. | ||
| - | |||
| - | VPORT_MEAS has not to be considered for power supply. | ||
| - | </note> | ||
| - | |||
| - | \\ \\ | ||
| - | ===== Low power detect ===== | ||
| - | Power loss can be detected by polling the value of the VIN_9V signal. It should fall down near 0V when both, PoE and Aux power, are lost. The first action to take when the VIN_9V value decreases is to stop the LoRa module. This will decrease the consumption so the gateway will have enough time to stop. The voltage value can be obtained with the following methods: | ||
| - | <code bash> | ||
| - | root@klk-lpbs:~# adc 4 | ||
| - | VIN_9V=48979mV | ||
| - | </code> | ||
| - | |||
| - | or: | ||
| - | |||
| - | <code c> | ||
| - | FILE * pf_file = NULL; | ||
| - | u32 u32_adc_value = 0; | ||
| - | |||
| - | pf_file = fopen ("/sys/bus/iio/devices/iio:device1/in_voltage0_raw", "r"); | ||
| - | if(pf_file != NULL) | ||
| - | { | ||
| - | fscanf (pf_file, "%d\n", &value); | ||
| - | fclose (pf_file); | ||
| - | pf_file = NULL; | ||
| - | } | ||
| - | u32_adc_value=( (value * 3300) / 4096 ); | ||
| - | u32_adc_value = ((u32_adc_value* 485) / 15); | ||
| - | </code> | ||
| - | <note important>Note that power loss can be detected only if the station is equipped with a backup battery !</note> | ||
| - | |||
| - | |||
| - | \\ \\ | ||
| - | ===== On/Off Button ===== | ||
| - | An ON/OFF button is located on the front side of the CPU module. This button is intended to perform a hard reboot, power down and power up of the Wirnet iBTS: | ||
| - | |||
| - | * **Hard reboot** - Press the button of the Wirnet iBTS. | ||
| - | * **Power down** | ||
| - | * Press the button between 1 to 5 seconds to **halt** the Wirnet iBTS. | ||
| - | * Wait for the shutdown of the Wirnet iBTS i.e. until the LEDs are switched off. | ||
| - | * The shutdown may take up to 30s depending on the current software activity. | ||
| - | * **Power on** - Press the button during 1 second to power on the Wirnet iBTS when powered off. | ||
| - | |||
| - | |||
| - | \\ \\ | ||
| - | ===== Voltage measurement ===== | ||
| - | |||
| - | All internal voltage measurement can be obtained using the following tool: | ||
| <code bash> | <code bash> | ||
| root@klk-lpbs:~# adc | root@klk-lpbs:~# adc | ||
wiki/ibts/power_management_ibts.1585152708.txt.gz · Last modified: 2020/03/25 17:11 by dlr
