Products > Test Equipment
New handheld scope+DMM, Fnirsi 2C23T, 2ch, 10MHz/50MSps (Nov 2023)
StalineShadow:
Hi, I finally received firmware v2.0.1 from the Fnirsi technical support, and I uploaded it, but unfortunately, there’s still nothing—after the upload, the device remains turned off. I'll wait until tomorrow to receive firmware 2.0.2, hoping that it will work again.
Tunas1337:
Thank you, pilatomic.
Also, reconstructing the firmware starting from Ghidra/IDA decompilations, and releasing that, doesn't break any laws in most jurisdictions, and certainly not China - it has been done for the Quansheng UV-K5 radio under the Apache license, and no one has knocked on anyone's door or threatened legal action. The entire Chinese electronics industry is based on IP sharing -- there was an article about it that I unfortunately can't find. Having a basis upon which modifications can be made would certainly be extremely useful.
dibu:
when you have a look a the firmware, you will realize just how bad it is, it doesn't make sense to reuse any part of it, it is good to identify ports, setting and protocols everything else can be built from the ground up, for now we just need the fpga bit-stream (part of the firmware) everything else can be scrapped.
dibu:
--- Quote from: pilatomic on August 06, 2024, 07:47:11 pm ---
Here you'll find my own Ghidra project and notes :
https://gitlab.com/Pilatomic/fnirsi_2c23t_fw
--- End quote ---
I checked your project, looks good and in a very large percent correct, it was very interesting comparing it to mine, in many cases we have the exact same function and variable names, to the point that i was wondering if you got hold of my project :-DD, i guess things are just obvious sometimes, from what i can tell you were more focused on things that actually matter, i got more distracted by various not very relevant things like bitmaps/fonts and so on.
Vad-B:
Guys, I just found that FNIRSI has released a new model, the 2C53T!
Atm no info on their official website, but it's available for order on Ali and the price is around €15 more compared to the 2C23T.
https://aliexpress.com/item/1005007580212627.html
In my opinion, it looks pretty good, just placed an order for it.
I hope the basic device architecture is similar enough to the 2C23T so that dibu and pilatomic might leverage their knowledge to fix the buggy original firmware or create a custom one.
Here’s the comparison table for the things that are different (by me + ChatGPT):
FeatureFNIRSI-2C23TFNIRSI-2C53TSample Rate (Oscilloscope)50MS/s250MS/sAnalog Bandwidth10MHz50MHzStorage Depth32kb1k points ???Vertical Sensitivity20mV/div-10V/div (X1)10mV/div-10V/div (X1)Time Base Range50ns-10s10ns-20sDisplay ModeYT/ScrollYT/Scroll/XYWaveform AnalysisNone8 basic operations + FFTCursor MeasurementNoneAvailableMultimeter Digits4 digits (10,000 points)4.5 digits (20,000 points)DC Voltage Measurement9.999V~999.9V1.9999V~1000VAC Voltage Measurement9.999V~750.0V1.9999V~750.0VDC Current Measurement9999uA~9.999A19.999mA~9.999AAC Current Measurement9999uA~9.999A19.999mA~9.999AResistance Measurement999.9Ω~99.99MΩ199.99Ω~19.999MΩSignal Generator Frequency1Hz-2MHz0-50kHz ???Signal Types (Generator)713
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