FNB58 app - Page 1
Forum section: electronics / testgear

author: PlainName
author_rank: Super Contributor
timestamp: January 06, 2024, 01:46:04 pm
content: Acquired a FNIRSI FNB58 USB meter and made sure it was the BT version so I can connect via my phone. But now I wonder what the point of Bluetooth is on this because I can't find the app anywhere. A google search turns up some info, mostly a reddit thread about it not working on Android 14, but no actual app.Anyone know if it really exists and, presuming it does, where to get it?

author: csuhi17
author_rank: Frequent Contributor
timestamp: January 06, 2024, 02:11:58 pm
content: https://www.elektormagazine.com/news/fnirsi-fnb58-reviewhttps://www.fnirsi.com.cn/download/usb

author: PlainName
author_rank: Super Contributor
timestamp: January 06, 2024, 02:18:10 pm
content: Yes, I can find references that the apk is on the website, but I can't find it on the website. Got the PC application, etc, but no apk.

author: csuhi17
author_rank: Frequent Contributor
timestamp: January 06, 2024, 02:32:14 pm
content: [ Specified attachment is not available ]Mine connects to the phone,but I haven't been able to extract data with it yet.first press "Run" in the upper right corner, then "Run" in the red circle in the middle...

author: Jon.C
author_rank: Unknown
timestamp: January 06, 2024, 02:34:47 pm
content: https://img.wqdres.com/res/0/20230428/11950bd0d9af4ae68be69df24c4bb2c3.ziphttps://www.fnirsi.com.cn/download/usb--- SUPPORT& DOWNLOAD --- usb tester -- mobile APP

author: PlainName
author_rank: Super Contributor
timestamp: January 06, 2024, 09:42:05 pm
content: Thanks very much, both. For some reason the website I see is not like the one in the screenie, but knowing itisthere lent me the perseverance to figure out how to get there in the end

author: Martini
author_rank: Regular Contributor
timestamp: June 20, 2024, 01:52:03 pm
content: Here's the link to the Bluetooth app for future reference:https://www.mediafire.com/file/if2gm8oiv99xasx/FNIRSI_Bluetooth_APP__old%25EF%25BC%2588Android%25EF%25BC%2589_v1.0.apk/fileI know it looks shady but it's how FNIRSI do it.On their download firmware page (https://www.fnirsi.com/pages/download-firmware), under USB tester, you'll find a*.txt filewith two links: one to the PC app and one to the Android app.If you want to update the firmware, it's of course (!!) not available on the /download-firmware page but rather on the FNB58 product's page:https://www.fnirsi.com/collections/usb-tester/products/fnb58But to update the firmware, you'll need the PC software from the /download-firmwareThe procedure is on page 17 of the manual (https://www.fnirsi.com/cdn/shop/files/FNB58-_Manual.pdf?v=15001951769436062594)

author: mjhughes
author_rank: Newbie
timestamp: November 04, 2024, 08:32:09 pm
content: The FNIRSI app for Android sucks hard. I tried decompiling it, and it's a hot mess. Something like 750000 lines of code scattered across 50000 files.In other words -- a big fact mess.Instead, I intercepted the ble packets and deduced their meaning.There are links to the python code I wrote in the github (see video description). It's only for Voltage and current because that's all I needed for Power. But deducing the other datatypes shouldn't be hard with a few controlled tests on the workbench and packet capture. (Details of how to proceed provided in an article athttps://www.boondockecho.com/news/hacking-bluetooth-to-learn-more-about-boondock-battery-lifeand in the video). The structure is laid out in the fileIn short -- the code there let's you get voltage and current over bluetooth le now (using python). If you want other info like DP and DN voltage, temperature, etc., it'll be a couple more hours work.Good luck!

author: schmadde
author_rank: Newbie
timestamp: July 07, 2025, 05:58:54 am
content: I hope others are still using the app and may be able to help me.I have a FNIRSI C1 that also uses the same App for BT Remote monitoring. Yesterday I tried using it but it didn't work. I know it does work with the FNB58, because I tried that just the day before without problems.For the C1, it does connect and I can enter the Data screen, but all the values are wrong or set to defaults including SN and FW version. On the top left corner on the yellow background it only shows "XXXXXXXX" instead of "FNIRSI-C1". At first I thought the device is broken or the FW wrong, but I tried my old phone and there it worked without problems.My old phone is a Galaxy Note 10+ running Android 12, the new one is an S24 Ultra running Android 15. I think the android app versions are identical because there is only one Version of the App AFAIK but I cannot tell for sure since the App does not tell you which version it is. Android App Info shows 1.0 for both of them.Does anybody know a fix or a workaround for this?