Could you please check you set the clock on the DCE side. Do a show controllers for the interfaces on each side of the link. One of them should recognise a DTE cable, and the other a DCE cable.
The clock needs to be set on the DCE side. If not, please post the results of the show controllers. This is what you should see: R2#show controllers Serial1/0 CD2430 Slot 1, Port 0, Controller 0, Channel 0, Revision 19 Channel mode is synchronous serial idb 0x852CC47C, buffer size 1524, V.35 DTE cable R5#show controllers Serial 2 CD2430 unit 0, Channel 0, Chip Revision 0C, Microcode 18 Channel mode is synchronous serial idb 0x2AAC08, buffer size 1524, V.35 DCE cable, clockrate 115200 Kevin Dorrell Luxembourg. They are just HTML tags. The forum accepts a limited range of them. For bold, start with this without the spaces:, and to end it. You can use 'u' for underline.
![Samsung pm43h serial protocol Samsung pm43h serial protocol](/uploads/1/2/5/4/125441107/583807838.jpg)
You can put '& n b s p;' at the beginning of a line to indent it, but it strips it each time you edit the posting so you have to put it in again by hand. So, let's see if adding the spaces has fooled it into printing the tags literally rather than tagging my whole posting! So, it is OK. The one I wish they would implement is ' '. Kevin Dorrell Luxembourg.
Serial Protocol. This is technical documentation for the serial protocol used by the UART bootloader in the ESP8266 & ESP32 ROMs and the esptool.py software 'stub loader' program.
Fred got a La Crosse wireless weather station as a gift and thought the LCD display was great, but he was dismayed that there was no means of extracting the temperature data for use on a computer. He thought that the modular design of the system would make it great for use in his home automation project. He tore into the base station and started looking around for easy places to get at the data he was looking for. He thought about tapping into the bus that controls the LCD in hopes of finding an easy to decode signal, but the weather station used a proprietary chip with an integrated LCD controller, making it all but impossible.
Instead, he started sniffing the data coming across the wireless link, and while he didn’t quite yet know what he was seeing, it was a start. He sniffed the signals using Audacity, and eventually found that the base station received 40-bit data bursts from each sensor. He dug further, and with the help of some data he found online, he was able to decode the data packets. The last hurdle he ran into was figuring out how the system’s CRC encoding worked. It took a bit of work but he eventually got it, and can now record data packets knowing that the data has come over the air intact. So far, it looks like his temperature monitoring system is working quite well, though he has several improvements planned for the near future. If you have a similar unit and are interested in extending its capabilities, Fred has posted plenty of code on his site.
Posted in Tagged, Post navigation. I’ve done something similar with the Davis weather stations. My blog shows how to interface a PC to the console for about $15 rather than using the $150 dongle from Davis.
I’ve also sniffed the console’s wireless receiver chip configuration so that I’ll be able to (eventually) receive the data on an IM-ME. I also expect that I could add data logger capabilities to my DIY interface for around $1. Haven’t gotten to this yet because, unfortunately, my time for hacking this thing in the summertime is almost non-existent. Thank you for the nice comments and the suggestions.! I used Audacity and my PC soundcard as a low cost oscilloscope.
It works for low frequency signals that are less than a few kHz. I sniffed what the receiver sub-module outputs to the controller, that is after demodulation. There the clock and the data seem at 19.2 kHz, which the soundcard can easily record.
I used 96kHz as a sampling rate to record the data. Thank you also for sharing links to similar projects, they are a useful source of information! You need to know what frequency you weather unit is listening to in case it’s a different frequency. You might be able to get that from the company.
Another option is an RTL/SDR dongle for about $10 that can cover a huge frequency band. But really once you know the frequency you need a directional antenna to do some rf hunting and triangulate where the signal is coming from. If you can repeatedly show that it points to a particular house then you might be able to convince law enforcement to approach them about it. But is it worth it to you to go through all that? Might be quite interesting to see the neighbors face when what they stole was traceable. I’m curious about hacking a Taylor Digital Projection Thermometer (about 20 yrs old). I want to be able to pick up the outdoor temp transmission on my computer, without interfering with the base unit or the transmit unit.
The Specs list the “Transmission: max. (30 m) open area, RF434 MHz. The FCC ID is TG3SS-5000TX with an output frequency of 434 MHz. What would I need on my computer to detect that frequency, read it, and display the outdoor temp on my computer? I’ve read some previous discussions re: Audacity (which I use on both Linux & Windows OS for editing mp3 files); but I’ve never used Audacity’s spectrum analyzer, etc. For the purposes discussed.