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Get down with reverse engineering. It's like solving a satisfying puzzle when you manage to get something to work!
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Trust me, I've been trying.
Real programmers use butterflies
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You are lucky it were just $80.
I once bought a DDR development FPGA board for €1700 from a major European manufacturer and could never get it to work. It came with closed source examples that seemed to work but no project I made ever worked.
I looked deeper into the documentation and the pins where the DDR was supposed to connect to the FPGA were wrong (I knew from other earlier tests of mine that some pins were connected to other peripherals like LEDs and a serial console) and even mentioned pins that did not exist in the FPGA that came soldered on the board.
I spent some more money hiring support from the manufacturer to complain and, after two weeks, they reluctantly sent me VHDL source code of a project that supposedly they used internally in the company to test the board.
The pins were all different from the documentation. And their source did not work either  .
I tried to keep complaining but they just closed the issue as "Fixed" and stopped replying.
Eventually I found out, from another unfortunate guy somewhere a few countries over, that the DDR would never work because the board had the connections very poorly routed which added too much noise and transients, and the reason the company's closed source example worked was because it was clocked at 1/16 the normal speed of the DDR (unusable for my project).
Regarding your predicament, I try to avoid Chinese companies for gadgets because they rarely have documentation for anything and never give support. They rather have you quit your current gadget and buy another from them.
If it is just an integrated circuit they make documentation because they want to sell to other companies that make gadgets.
So you might be on your own unless you can find someone that is also working on a modification of those gadgets and could already reverse engineer them.
I think products without a functional documentation should not get approved by whomever certifies them because, for me, a product (hardware and/or software) without proper documentation is just trash.
Good luck
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Ouch! I don't envy you that 1700 euro experience.
ElectronProgrammer wrote: a product (hardware and/or software) without proper documentation is just trash.
Amen!
Real programmers use butterflies
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I find equipment vendor SDKs to be the worst!
Here I am working to enable the use of their products by my customers, and they supply documentation and code samples that are truly useless, even when they work.
You'd think they would want to make my life as productive as possible to sell more of their hardware.
It all boils down to what is valued by management. There are many examples of severe myopia when it comes to proper methodology, documentation, and QA.
Cheers,
Mike Fidler
"I intend to live forever - so far, so good." Steven Wright
"I almost had a psychic girlfriend but she left me before we met." Also Steven Wright
"I'm addicted to placebos. I could quit, but it wouldn't matter." Steven Wright yet again.
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You get what you pay for...
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It's not like I bought cheap components. I paid retail for gadgets that were priced at about what they were worth, if they were usable, that is.
Real programmers use butterflies
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I have learned to avoid buying from manufacturers that don't speak my language. Getting any real help is a pain.
Several years back, I bought a batch of fanless mini-PCs from a Chinese manufacturer to run some digital display boards. (Someone else's pick, but yes, I signed off on it.) When they arrived, I couldn't do anything with them. The BIOS was not fully programmed on any of them. After almost two months of emailing and attempting to use the chat feature on their site (and a couple of international calls to their un-manned support line), I finally got a response from someone with a link to download all the BIOS files and driver files I would need to set the PCs up. It took 8 hours to download less than 20 Meg of files. I think the server must have been a PC under someone's desk with a dial-up internet connection.
I flashed the BIOS, installed Windows, installed the drivers, then set up and deployed my display boards. About one week after deployment, the video chips on all of them burned out. I opened the cases to find that there was a piece of foam (not the thermal transfer kind, more like thin packing foam) pressed between the heat sinks and the case.
I was left with fourteen PCs dead, two months wasted time and effort, and users calling me an idiot for deploying a bunch of new display boards that looked like a colorful lightning show superimposed over bug races just days after turning them on. It took a long time to live that one down and repair my reputation.
From now on, manufacturers have to have a support office in a country that speaks my language before I will buy anything from them.
Money makes the world go round ... but documentation moves the money.
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I don't really have that option as the ESP32 platform itself is Chinese in origin.
Real programmers use butterflies
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Alert Text: Non-redundant:Sufficient Resources from Redundancy Degraded or Fully Redundant for Power Resource has deasserted.
Type of Alert: Warning - Redundant Power Supply
Getting these messages is always a stressful event. Only after logical/linguistic processing I concluded that probably all is well with our EsxI server. Can't they not just say: "Power has been restored. Have a nice day."
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I'd be saying more than "hell" if I saw that!
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My mistake. This message was sent from our XServer (Lenovo) IMM system. EsxI is running on the system, but has nothing to do with this message. I can happily go on "remediate" EsxI and I will not deassert myself.
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someone sent me this article. Ban Cryptocurrency to Fight Ransomware - WSJ[^]
All I can think about is. So lets ban something because we don't like it just because we know some bad people are using it.
First off the bad actors will find another method of payment. Grand Caymens etc...
Second off there are legitimate uses for Crypto that would be killed.
I am not a huge fan of crypto currencies but seriously this just seems like rubbish to me.
Thoughts?
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this was actually me. I accidently signed in with my google account which I never use. anyway thoughts?
To err is human to really elephant it up you need a computer
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It is my opinion that people often call for bans on things they don't understand and/or are afraid of. People also have a tendency to not like what they do not understand.
Fear and lack of understanding is probably due mostly to lack of education on said topic/subject. In this case, crypto currencies.
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People fear what don't understand, hate what they are afraid of and destroy what they hate...
M.D.V. 
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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I put people that call for bans in the same group that call for "class action" lawsuits for everything. Most people don't realize that a class action suit lets the company pay a lot less overall, and only the primary plaintiff and the lawyers get any real payout. It costs a company a lot more to deal with thousands of "small claims" cases than one "class action" case.
In the case of people calling for bans, all they are doing is drumming up free advertising for the people they want banned.
Money makes the world go round ... but documentation moves the money.
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Seems like, some time back, they decided to save lives on the highway by banning speeding.
If you can keep your head while those about you are losing theirs, perhaps you don't understand the situation.
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more like speed limits. you are still speeding. but I get your point.
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Penny ante and mostly about revenue. They also banned drugs and guns. But to paraphrase this post[^] from a couple of days ago, markets find a way.
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I have been involved in the recovery from ransomware 4 times. 2 were serious. The first was some 4 or so years ago. The ransom demand was via credit card, not sure anyone had heard of bitcoin yet. They "only" encrypted data files. Don't recall any dingbat journalist suggesting that credit cards be banned.
A couple of years later, another one I helped with took down a domain controller with Exchange. Both clients had air gaped backups less than 2 days old. Both triggered via email, one exchange the other yahoo mail. Both clients maintain strict PCI compliance, no CC info can be retained. Costs money. Causes headaches. Provides income to IT contractors.
If you can keep your head while those about you are losing theirs, perhaps you don't understand the situation.
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theoldfool wrote: Both triggered via email
Did they subsequently campaign to ban e-mail? I could get on board with that!
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If it wasn't for spam and my daily briefing from Cortana, I wouldn't get much email.
Come to think of it ....
If you can keep your head while those about you are losing theirs, perhaps you don't understand the situation.
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Thoughts? "There is no connection between crime and thinking you can get away with it". That's your theory.
It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food
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Normally I like and agree with the WSJ, but in this instance they're showing their bias in favor of current industries. In this case it's the banking industry which hasn't figured out how to handle cryptocurrencies.
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