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Oznaka: usb

Resolving problem flashing ESPHome into Amica NodeMCU with CP2102

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I got myself ESP8266 Wireless module NodeMCU development board with CP2102 serial chip . It was advertised as original and with least problems of all NodeMCU versions.

I had nothing but problems trying to flash it with ESPHome Flashing Wizard (trying Tasmota was no better). Actually, issues were linked to CP2102 serial chip. One PC could not even recognize it when connected to USB. Other two did, but only after manual persuasion. And even than, flashing did not go through.

I finally managed to flash firmware by avoid using CP2102 at all and accessing ESP8266 chip directly. As I had other serial adapter, based on FT232RL FDTI232 USB to serial adapter I use for flashing ESPHome firmware to Sonoff devices, I build new adapter cable to connect it to ESP8266 bypassing serial interface on NodeMCU board. […]
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Universal CAT and programming USB to serial TTL interface for ham radio

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Some years ago I posted article describing Universal CAT and programming USB to RS232 TTL interface for ham radio that I made.

Here is small update, adapter for YAESU FT-8900, FT-8800 and alike radios.

FT-8900 and FT-8800 and some other Yaesu radios use two wire interface. One wire is ground and other is both RX and TX. This is also known as CIV-I interface used in Icom radios.

CIV-I interface is quite simple. There is a diode (universal like 1N14148) connecting RX and TX, oriented cathode toward TX, with one 10K pull up resistor to 5V on RX. Here is schematics:

However, I found out that YAESU FT-8900 already provides pull up voltage on PKS line, so, there is no need for 10K pull up resistor. […]
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Universal CAT and programming USB to RS232 TTL interface for ham radio

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As soon as I got first two ham radio rigs, I needed to connect them both to PC, to program memories or use CAT control from logging software. I realized that it is impractical to have as many USB to RS323 adapters as rigs.

As serial connection for radio requires just RX, TX and GND lines, and it is the same for most of modern radio stations. It is actually only radio connector that is different – signaling is the same.

It showed up quite easy to build simple multirig adapter. All you need to do is to use existing USB to serial interface adapter, cut it’s cable in two and insert male and female three pin 3.5 mm jack (commonly used as stereo audio connectors). […]
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RMPrepUSB – moćna alatka za usb diskove

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Pre nekog vremena sam preporučio HP USB Disk Storage Format Tool kao dobru alatku za sređivanje USB memorije. Danas sam na Internetu iskopao RMPrepUSB koji je još korisniji.

USB diskovi su postali stvar svakodnevice. Mnogi su i zaboravili na diskete, pa i CD-ove kao medij za fizički prenos podataka. Čak je postalo uobičajeno nositi sa sobom hadr disk sa USB priključkom.

Međutim, iako su dugo u upotrebi, USB diskovi su nekako ostali komplikovani za sve osim puki prenos podataka. Ponajpre tu mislim na mogućnost da se sa USB diska podigne operativni sistem ili bar instalacija nekog programa kao što se to čini sa CD i DVD diskovima. […]
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Podešavanje Huawei E220 USB 3G/GSM modema za MTS (Telekom Srbija) i Mobtel

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Nabavio sam povoljno korišćeni MTS-ov Huawei E220 USB 3G/GSM modem pa sam se malo mučio oko podešavanja. Zato evo ovde zabeleški u vezi podešavanja, da ne zaboravim, a može još nekome da zatreba.

huawei-e220Huawei E220 je interesanta spravica. Spaja se na USB priključak i omogućava računaru pristup Internetu preko mobilnog operatera. Cena novog je oko 50 evra, mada ga je moguće kupiti u okviru raznih paketa kod mobilnih operatera (imaju ga i Telekom i Mobtel) jeftinije ali sa ugovornom obavezom.

S obzirom da sam uređaj kupio polovan, uz njega nisam dobio ništa, pa ni uputstvo kako se podešava. Dodatno, koristio sam svoj broj, a nisam uz uređaj dobio namensku karticu, što je, izgleda, stvar malo zakomplikovalo. […]
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Debut Video Capture – šest muva jednim udarcem i to još besplatno

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Baš volim kada naiđem na neki besplatan program koji radi dobar posao. Debut Video Capture Software je takav program.

Namenjen je snimanju video zapisa sa USB veb kamere, video (TV) kartice i sa ekrana računara. To su tri muve, a još tri dobijate jer pored video zapisa, program može da sa bilo kog od ovih izvora snimi i trenutnu statičnu sliku.

debut-video-capture-software

Kao i svaki dobar program i ovaj je jednostavan. Već na osnovnoj radnoj površini imate mogućnost izbora uređaja sa koga snimate  (video ulaz ili  slika sa ekrana računara), opciju za snimanje trenutne slike sa uređaja, kao i potrebna podešavanja.

Snimanje sa video uređaja se odnosi ne trenutno izabrani urešaj (ako ih imate više). […]
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