# RAK 5205 tracker **URL:** \ **Category:** End Devices (Nodes)\ **Created:** [September 20, 2018, 2:11pm UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052 "2018-09-20T14:11:22Z")\ **Posts on this page:** 14\ **Page:** 4
**Author:** ![Jeff-UK](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeff-uk/32/35697_2.png) [@Jeff-UK](https://www.thethingsnetwork.org/forum/u/Jeff-UK)\ **Post date:** [June 13, 2019, 12:38pm UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/98 "2019-06-13T12:38:12Z")
Schematic for the 5205: ![image](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/4/c/4cecbaab303673980915a21a238d1c1e369831bf.png) ![image](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/c/1/c136b2f0f776862b812655ff9fbcb81ae1a01752.png) ![image](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/8/1/816abf72f5b836f27ae7695a9347e95abeb43ff2.png) 🙂 ---
**Author:** ![LoRaTracker](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/loratracker/32/48502_2.png) [@LoRaTracker](https://www.thethingsnetwork.org/forum/u/LoRaTracker)\ **Post date:** [June 13, 2019, 12:51pm UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/99 "2019-06-13T12:51:46Z")
Thanks. With no connection to the GPSs Vbkp pin, if you want to use hot fixing you can only use software shutdown of the GPS and that only reduces current to 500uA. Maybe the schematic is in error here. There is a power switch to turn off the power to the GPS, which would reduce its sleep current to 0. However turn the power on and the GPS is starting from cold, with a typical run time of 40 plus seconds at 33mA, very battery unfriendly. ---
**Author:** ![bluejedi](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/bluejedi/32/44639_2.png) [@bluejedi](https://www.thethingsnetwork.org/forum/u/bluejedi)\ **Post date:** [June 13, 2019, 1:55pm UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/100 "2019-06-13T13:55:00Z")
I can confirm that V\_BCKP (pin 6) is not connected (measured with multimeter) to VCC\_3V3 (nor GPS\_3V3, nor VBATT nor VBIN) . One would expect it to be connected to VCC\_3V3 (which is battery powered). I also do not see a solder jumper that could enable it. With some soldering craftmanship V\_BCKP may be manually connected to VCC\_3V3. According to the datasheet that would draw 15 uA (@3.0V) backup current for the MAX-7Q. The power for the GPS can be switched off completely (with PA15), so if correctly switched off the GPS should not contribute to the measured 1.5mA in ‘low power’ / sleep. ---
**Author:** ![LoRaTracker](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/loratracker/32/48502_2.png) [@LoRaTracker](https://www.thethingsnetwork.org/forum/u/LoRaTracker)\ **Post date:** [June 13, 2019, 2:12pm UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/101 "2019-06-13T14:12:40Z")
> [@bluejedi](#): > > With some soldering craftmanship V\_BCKP may be manually connected to VCC\_3V3. According to the datasheet that would draw 15 uA (@3.0V) backup current for the MAX-7Q. 15uA would be about right for a Ublox in software shutdown, but I was going on the GITHUB for the RAK 5206 which says they are using a L76. This matches the schematic. If they swapped to a Ublox MAX 7Q, then they ought not to have left Vbckp floating, from the 7Q datasheet; “If no backup supply voltage is available, connect the V\_BCKP pin to VCC\_IO (or to VCC if not avaiable)” ---
**Author:** ![bluejedi](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/bluejedi/32/44639_2.png) [@bluejedi](https://www.thethingsnetwork.org/forum/u/bluejedi)\ **Post date:** [June 13, 2019, 2:22pm UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/102 "2019-06-13T14:22:18Z")
> [@LoRaTracker](#): > > but I was going on the GITHUB for the RAK 5206 which says they are using a L76. I have a RAK5205 VER.B board here with a Ublox MAX-7Q. ---
**Author:** ![Sandgroper](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/sandgroper/32/46619_2.png) [@Sandgroper](https://www.thethingsnetwork.org/forum/u/Sandgroper)\ **Post date:** [July 8, 2019, 11:32pm UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/103 "2019-07-08T23:32:27Z")
The GPS switch off with PA15 is flawed because it does not disconnect the RX line input to the GPS. This means the RX line will be powering the GPS via the GPS module input protection circuitry. You can work around this HW limitation by disabling the serial port in software putting the pin in input mode. ---
**Author:** ![BoRRoZ](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/borroz/32/44234_2.png) [@BoRRoZ](https://www.thethingsnetwork.org/forum/u/BoRRoZ)\ **Post date:** [July 19, 2019, 10:35pm UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/104 "2019-07-19T22:35:14Z")
new firmware for RAK5205 Wistrio, **[V3.0.0.2](https://downloads.rakwireless.com/en/LoRa/WisTrio-LoRa-RAK5205/Firmware/)** ---
**Author:** ![Oyvindes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/oyvindes/32/20484_2.png) [@Oyvindes](https://www.thethingsnetwork.org/forum/u/Oyvindes)\ **Post date:** [July 20, 2019, 6:28am UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/105 "2019-07-20T06:28:35Z")
Anyone tested sleep current on the new fw? ---
**Author:** ![fomi](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/fomi/32/20484_2.png) [@fomi](https://www.thethingsnetwork.org/forum/u/fomi)\ **Post date:** [July 22, 2019, 10:45am UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/106 "2019-07-22T10:45:16Z")
![image](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/a/e/aef5afec15bf86453cb384178fb9506747e52f67.jpeg) ---
**Author:** ![BoRRoZ](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/borroz/32/44234_2.png) [@BoRRoZ](https://www.thethingsnetwork.org/forum/u/BoRRoZ)\ **Post date:** [July 25, 2019, 11:53am UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/107 "2019-07-25T11:53:38Z")
new firmware for RAK5205 Wistrio, **[V3.0.0.3](https://downloads.rakwireless.com/en/LoRa/WisTrio-LoRa-RAK5205/Firmware/)** ---
**Author:** ![andreas58](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/andreas58/32/35697_2.png) [@andreas58](https://www.thethingsnetwork.org/forum/u/andreas58)\ **Post date:** [July 30, 2019, 11:13am UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/108 "2019-07-30T11:13:58Z")
My RAK5205 won’t do anything with this new firmware. Am I missing something? I have a WisTrio-Lora RAK5205 rev B. Regards, Andre ---
**Author:** ![andreas58](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/andreas58/32/35697_2.png) [@andreas58](https://www.thethingsnetwork.org/forum/u/andreas58)\ **Post date:** [July 30, 2019, 12:01pm UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/109 "2019-07-30T12:01:03Z")
Sorry for bothering… Solved. ---
**Author:** ![BoRRoZ](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/borroz/32/44234_2.png) [@BoRRoZ](https://www.thethingsnetwork.org/forum/u/BoRRoZ)\ **Post date:** [July 30, 2019, 12:07pm UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/110 "2019-07-30T12:07:13Z")
cool… what did you ‘missed’ ? ---
**Author:** ![andreas58](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/andreas58/32/35697_2.png) [@andreas58](https://www.thethingsnetwork.org/forum/u/andreas58)\ **Post date:** [July 30, 2019, 12:27pm UTC](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052/111 "2019-07-30T12:27:33Z")
Reading the updated manual… Tried to upload “old” way… Missed the need for updating de BOOT section 🙂 [Previous page](https://www.thethingsnetwork.org/forum/t/rak-5205-tracker/18052.md?page=3)