RAK7200 pinout information

fboesche · May 12, 2020, 10:55pm

Can someone please tell me what the J4 and P2 connectors are used for?

ZhuQI · May 13, 2020, 3:48am

P2 is used to charge the battery with an external solar panel.

J4 is the antenna welding point of LoRa.

hairuitao · May 13, 2020, 5:35am

Hi fboesche,P2 is as discribe as Zhuqi ,J4 is a backup connector of GPS antenna.

ZhuQI · May 13, 2020, 6:01am

Thanks for the correction of hairuitao.

JeroenKl · May 13, 2020, 8:26am

Dear @ZhuQI,

Can you provide info with regards the solar panel? Max voltage?

BR,

Jeroen

ZhuQI · May 13, 2020, 8:28am

Hello @hairuitao , can you provide the solar panel information?

fboesche · May 14, 2020, 1:28am

Excelent! Many thanks ZhuQI

fboesche · May 14, 2020, 1:31am

Thank you, then is confirmed that J4 is for GPS antenna.

JeroenKl · May 16, 2020, 4:25pm

Can you help @hairuitao ?

hairuitao · May 17, 2020, 1:08am

hi JeroenKl,
If you want to use solar panel, you need to add a Zener diode on D5 and solder a 5V solar panel to P2.

NemoN · July 22, 2020, 9:20am

@hairuitao So we can solder an alternative GPS antenna(connector) here? Does the firmware support an external antenna? Is it used automatically?

JeroenKl · July 29, 2020, 7:44am

Dear @hairuitao,

Can you please provide the zenerdiode specifications? I assume it is 5V1 but I’m not sure.
Also where is D5 located on the board?

BR,

Jeroen

JeroenKl · August 27, 2020, 2:59pm

Dear @hairuitao,

Can you please provide the zenerdiode specifications? I assume it is 5V1 but I’m not sure.
Also where is D5 located on the board?

BR,

Jeroen

hairui · August 27, 2020, 11:42pm

Hi JeroenKI,
You can find the datasheet as below link :
https://www.alldatasheet.com/view.jsp?Searchword=LBZT52B5V1T1G
I think both 5V1 and 5V6 can be work well. Because the input voltage rage of the charging chip is 4.5V to 6.5V.
And the location of D5 is as follow picture.