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by d82k
Sat May 02, 2015 10:17 am
Forum: Automation, sensing and robotics
Topic: Using a 433 transmitter powered at 5V
Replies: 1
Views: 761

Using a 433 transmitter powered at 5V

Dear All, I would like to connect my 433mhz transmitter (CHJ-FST1000M http://www.dx.com/p/zndiy-bry-433mhz-rf-transmitter-module-for-arduino-arm-mcu-wl-green-334387#.VUSiSTgfqM8 ) to my RPi (Model B Revision 2.0). Now I would like to connect it like this: VCC -> 5V RPi GND -> GND RPi DATA -> GPIO-4 ...
by d82k
Fri May 01, 2015 12:00 pm
Forum: Automation, sensing and robotics
Topic: 5V relay - Is this a safe connection?
Replies: 7
Views: 1500

Re: 5V relay - Is this a safe connection?

Dear all, thank you for your kind replies. Here some additional details on the relay: It is a finder 36.11.9.005.4001 (http://gfinder.findernet.com//assets/Series/356/S36EN.pdf) It says "Minimum switching load mW (V/mA): 500 (5/100)" Currently it seems working... :| I did not understand if I have to...
by d82k
Sun Apr 26, 2015 7:19 pm
Forum: Automation, sensing and robotics
Topic: 5V relay - Is this a safe connection?
Replies: 7
Views: 1500

5V relay - Is this a safe connection?

Dear all, I would like to connect a realy to my RPi. Having only one working at 5V, here is how I have connected it: 5V | | ---- | | | ----S Relay Diode | S 1N4004 A ----S | | ---- | GPIO |c 17 ---/\/\/\---|< Transistor R 1K |e 2N3904 NPN | | GND Since GPIOs are 3.3V is this a safe connection, can t...
by d82k
Mon Jan 05, 2015 11:21 am
Forum: General programming discussion
Topic: Plotting with highcharts Xively feeds
Replies: 2
Views: 654

Re: Plotting with highcharts Xively feeds

Dear iinnovations,
thank you for your repy.
I think that for non-commercial use ihighcharts is free.. I will doublecheck and look to your advices and code.

What else is necessary beside a webserver (like apache)? jQuery? is it heavy for raspberry?
Thank you,
dk
by d82k
Sat Jan 03, 2015 10:29 pm
Forum: General programming discussion
Topic: Plotting with highcharts Xively feeds
Replies: 2
Views: 654

Plotting with highcharts Xively feeds

Dear all, I would like to plot using highcharts, on a webpage hosted on the RPi, Xively feeds of a private device, possibly dynamic that generate the graph of the last 24h getting live data. Does anyone already did something similar? I found something on the web but I was not able to make it work. T...
by d82k
Sat Dec 27, 2014 9:05 pm
Forum: Automation, sensing and robotics
Topic: Serial communication RPi - Arduino via USB
Replies: 2
Views: 1220

Serial communication RPi - Arduino via USB

Dear all, For my project I need to interface RPi with arduino. Reading online the best would be to connect the two via USB. I was thinking about using a python script to interact via serial, but I have two use cases: 1. RPi sends a value, and based on that value the arduino replys 2. When arduino re...
by d82k
Thu Aug 01, 2013 4:20 pm
Forum: Automation, sensing and robotics
Topic: RPi reading serial and store values received in a databse
Replies: 3
Views: 5289

Re: RPi reading serial and store values received in a databs

Thank you both for your answers.

thepatman, really interesting, and similar to something I would like todo too. Would you be so kind to share some code such as the script to listen the serial port please?
thank you,
dk
by d82k
Sat Jul 13, 2013 5:03 pm
Forum: Automation, sensing and robotics
Topic: RPi reading serial and store values received in a databse
Replies: 3
Views: 5289

RPi reading serial and store values received in a databse

Dear All, I have attached an Arduino to my RPi. Arduino has some sensors and some buttons attached to it, I can manage them through the serial interface. Now, I would like to have sensors data, as well as button status, saved on a database, so that for instance I can read temperature each hour or ch...
by d82k
Sun May 12, 2013 8:27 pm
Forum: Automation, sensing and robotics
Topic: Freedomotic Home Automation on Raspberry
Replies: 78
Views: 43979

Re: Freedomotic Home Automation on Raspberry

Hello,
Is it possible to configure to make it work with 433 MHz transmitter and receiver connected to RPi gpio?
I actually use the transmitter to control my remote switches Elro and Intertechno, just wondering if it can be used for these too.

Thank you,
dk
by d82k
Sat May 11, 2013 7:54 am
Forum: Networking and servers
Topic: Communication between linux devices
Replies: 5
Views: 1220

Re: Communication between linux devices

Hello, thank you for your replies, yes actually I was missing something maybe... The message is really short, a string of character or number (containing parameter for the script on RPi side). The thing is that unix devices are Linux embedded and they are limited in commands and installations. I'm n...
by d82k
Fri May 10, 2013 1:19 pm
Forum: Networking and servers
Topic: Communication between linux devices
Replies: 5
Views: 1220

Communication between linux devices

Dear All, I have some unix based devices that I would like to make communicate with the RPi. On the devices I'm running different scripts, and at some point they send some information to the RPi and trigger the execution of a script. Actually things works like this: on the devices there is a script ...
by d82k
Sat Apr 27, 2013 3:13 pm
Forum: Automation, sensing and robotics
Topic: RF receiver 433MHZ
Replies: 37
Views: 52289

Re: RF receiver 433MHZ

Hello Chris,
Which java program are you using? I'm interested in trying it too if possible
Thank you
dk
by d82k
Mon Mar 18, 2013 5:56 pm
Forum: Automation, sensing and robotics
Topic: RF receiver 433MHZ
Replies: 37
Views: 52289

Re: RF receiver 433MHZ

Dear Geoff, thank you for your reply. What about if I want to display the full bit received "10001000" for 0 and "10001110" for 1? I have also tried to increase the length to have more than 24 but does not work... This is because I also wish to interface it to my oregon scientific termomether (detai...
by d82k
Sat Mar 16, 2013 10:06 pm
Forum: Automation, sensing and robotics
Topic: RF receiver 433MHZ
Replies: 37
Views: 52289

Re: RF receiver 433MHZ

Hi, I'm interested too in connecting my receiver to the rpi. My goal is to get the code of a remote for 433mhz plugs which I cannot find.. I would like to keep transmitting the code from the remote and in some way record it with the rpi. I have found this https://github.com/CurlyMoo/433.92-Raspberr...
by d82k
Mon Mar 04, 2013 7:54 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: TCN75 i2c temperature
Replies: 7
Views: 2330

Re: TCN75 i2c temperature

Hi techpaul,

I was finally able to solder the TCN75 and connect it to the raspberry. Thank you for your advices, it worked.

Using:

Code: Select all

echo $(($(i2cget -y 0 0x48)))
I can read the temperature, but I don't feel like it is the accurate value... any ideas?
Thank you,
dk
by d82k
Sat Mar 02, 2013 1:44 pm
Forum: General discussion
Topic: USB Dial-Up Modem
Replies: 14
Views: 13614

Re: USB Dial-Up Modem

Hi,
does anyone of you been able to make Trendnet TFM-561U work with raspberry pi and make it recognize the caller id?

Thank you,
dk
by d82k
Thu Feb 21, 2013 1:38 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: TCN75 i2c temperature
Replies: 7
Views: 2330

Re: TCN75 i2c temperature

Thank you techpaul, for your answer. Yes I know and it is really tiny... but this is what I have now and wondering if it will work. Ok I understood correctly than! So I can connect it to the i2c bus with no other additional component in between. I'm new to i2c.. For the addressing then I should unde...
by d82k
Wed Feb 20, 2013 11:06 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: TCN75 i2c temperature
Replies: 7
Views: 2330

TCN75 i2c temperature

Dear all, I was able to get a TCN75 (http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010752), i2c temperature sensor I would like to connect to the raspberry pi. Can anyone help me please understanding how to connect it? I have tried to do some research on the web but no luck.. Do just ...
by d82k
Mon Feb 18, 2013 8:25 pm
Forum: Automation, sensing and robotics
Topic: RF receiver 433MHZ
Replies: 37
Views: 52289

Re: RF receiver 433MHZ

Hi, I'm interested too in connecting my receiver to the rpi. My goal is to get the code of a remote for 433mhz plugs which I cannot find.. I would like to keep transmitting the code from the remote and in some way record it with the rpi. I have found this https://github.com/CurlyMoo/433.92-Raspberry...
by d82k
Sat Feb 16, 2013 12:09 am
Forum: Automation, sensing and robotics
Topic: RF Bitbanger ported to Raspberry Pi
Replies: 91
Views: 42062

Re: RF Bitbanger ported to Raspberry Pi

Dear all, I have tried to install many times rfbitbanger, following the different method suggested here but I get a lot of errors.. the last e most common is : /home/pi/rf-bitbanger/rfbb# sudo insmod rfbb.ko Error: could not insert module rfbb.ko: Invalid module format What can I do? I'm running 201...
by d82k
Sun Feb 10, 2013 8:23 pm
Forum: Automation, sensing and robotics
Topic: RF receiver 433MHZ
Replies: 37
Views: 52289

Re: RF receiver 433MHZ

Hi, I got a very similar receiver and trasmitter (http://shop.boxtec.ch/433mhz-link-pi-40971.html) (details: http://shop.boxtec.ch/pub/seeed/315MRFlink.pdf). I would like to connect the receiver to the raspberry pi to record 433 signals. Next step would be to read temperature from my old oregon scie...
by d82k
Sat Dec 08, 2012 11:40 am
Forum: Automation, sensing and robotics
Topic: RF Bitbanger ported to Raspberry Pi
Replies: 91
Views: 42062

Re: RF Bitbanger ported to Raspberry Pi

Dear all, I would like to better understand the working of the tx module. Suppose I know the exact sequence to be trasmitted in terms of signals and the correct timing (example from here: http://elektronikforumet.syntaxis.se/wiki/index.php/RF_Protokoll_-_Nexa/Proove_%28%C3%A4ldre,_ej_sj%C3%A4lvl%C3%...

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