Search found 37 matches

by turboscrew
Thu Jul 27, 2017 1:24 pm
Forum: Generic STM32F103
Topic: Blue pill current?
Replies: 6
Views: 61

Re: Blue pill current?

I don't know which schematics to look into.. BPill http://wiki.stm32duino.com/images/c/c1/Vcc-gnd.com-STM32F103C8-schematic.pdf I understand that different manufacturers can use different components. A friend of mine has some bluepills with totally wrong RTC crystals. On his boards, the RTC doesn't...
by turboscrew
Thu Jul 27, 2017 10:39 am
Forum: Generic STM32F103
Topic: Blue pill current?
Replies: 6
Views: 61

Re: Blue pill current?

I don't know which schematics to look into - there is no sign of any manufacturer. I took a microscope shot from the chip, though, and it says "DE=A1D" on the top. I guess it's RT9193-33GB. Thanks a heap!

I guess it's better NOT to use the on-board internal regulator.
by turboscrew
Thu Jul 27, 2017 9:38 am
Forum: Off topic
Topic: What is RSSI
Replies: 7
Views: 176

Re: What is RSSI

Yep, but they don't explain the RSSI mesurement: what is measured an how. What I'm wondering is that very often when I get some data, the RSSI is pretty small. I get better RSSI with smaller RX filter bandwidth, but no data. What I'd like to know, if there is the same transmission that fits within t...
by turboscrew
Thu Jul 27, 2017 9:19 am
Forum: Generic STM32F103
Topic: Blue pill current?
Replies: 6
Views: 61

Blue pill current?

Does anyone happen to know how much current the on-board 3.3V regulator can supply? I'm trying to put together a small 433MHz network. I wrote some kind of scanner using a CC1101-based small radio module, and I was wondering whether it's safe to feed that (blue pill + radio module) with a 5V USB ser...
by turboscrew
Tue Jul 25, 2017 1:22 pm
Forum: Off topic
Topic: What is RSSI
Replies: 7
Views: 176

Re: What is RSSI

RogerClark wrote:
Fri Jul 21, 2017 3:34 am
Can I suggest you raise this topic on a TI forum about this device, as the would have specific knowledge on TI products

e.g.
http://e2e.ti.com/search?q=cc1101
I did, but I didn't, really, get an answer.
by turboscrew
Thu Jul 20, 2017 11:31 am
Forum: Off topic
Topic: What is RSSI
Replies: 7
Views: 176

Re: What is RSSI

I could understand a RSSI 3dBm smaller with double bandwidth, but I got RSSI = -49 dBm with 464kHz RXBW, but RSSI -94 with RXBW=541kHz.
by turboscrew
Wed Jul 19, 2017 11:06 pm
Forum: Off topic
Topic: What is RSSI
Replies: 7
Views: 176

What is RSSI

What does RSSI typically measure? Energy within a band or average energy density or what? I was trying to find out the radio parameters of a 433 MHz USB dongle. I wrote some kind of scanner for a blue pill with CC1101 radio module and I got weird results: When the base frequency is the same, I got s...
by turboscrew
Thu Mar 23, 2017 4:13 pm
Forum: Off topic
Topic: Chinese character encodings
Replies: 18
Views: 639

Re: Chinese character encodings

I'm not sure, but the most important for me now may be:
./录脛麓忙脝梅录掳脜盲脰脙脨脜脧垄/RF1101_232脨戮脝卢录脛麓忙脝梅脜盲脰脙.txt
(If only I knew what is this configuration for...)
by turboscrew
Tue Mar 21, 2017 4:28 pm
Forum: Off topic
Topic: Chinese character encodings
Replies: 18
Views: 639

Re: Chinese character encodings

Linux's 'uchardet' could figure out the encoding (GB18030). And I used 'iconv' to change the encoding. The problem is now the translation. It looks like Google translate is not up to it and neither was Reverso. Both produced nonsense. Google translate: 麓庐驴脷碌梅脢脭脠铆录镁 -> Lu Lu donkey spoons of the Unit...
by turboscrew
Tue Mar 21, 2017 1:05 pm
Forum: Off topic
Topic: Chinese character encodings
Replies: 18
Views: 639

Re: Chinese character encodings

I got the characters converted and the names translated by Google translate, but... :lol: ls -R . > ../tree.txt iconv -f GB18030 -t UTF-16 tree.txt > tree_conv.txt Now it shows: .: 录脛麓忙脝梅录掳脜盲脰脙脨脜脧垄 脟媒露炉 脧脿鹿脴脌媒鲁脤 outfile.txt RF1100-232脢鹿脫脙脢脰虏谩.pdf RF1100-232-V2-outline.PCB text.txt 麓庐驴脷碌梅脢脭脠铆录镁 USB11...