Hi guys, Thanks for your replies!
My current projet is to drive my towel heater on the bathroom. I've deciphered IR codes to control it. The idea is to activate heater before I wake up, so I can have hot towel when showering :) I have a script scanning a dedicated google calendar, then retrieve commands and sends them to a Bee card that reproduce IR code to activate my towel heater... How fun, you'll agree... (mostly I couldn't take it anymore with cold towel with a heater requiring more than one hour before getting hot, a huge problem as you all could imagine, something not acceptable in 2013...) I usually use Xbee modules, but they are too expensive (2.5x price of my Jaluino Bees), and I don't have any more. I indeed ordered RFM70 modules, but in the mean time, I wanted to give a try with RF modules I bought months ago. I also tried, at first, bluetooth module, but I can't get a reliable serial link. I'm not sure where it comes from, but link gets broken some times. And towel remains cold, how not fun... So I switched to RF modules, I thought it would be quite straight forward, but it's more complicated than expected... Another project would be to monitor my cellar, which is 4 floors below. Bluetooth won't do it, neither Xbee, will RF 433MHz modules would ? Cheers Seb On 15 February 2013 08:46, Joep Suijs <[email protected]> wrote: > As a matter of fact, I did. Ages ago for my bacheler project. > It takes a lot of work to create a reliable link (encoding, checksum, > retransmission). 2.5 ghz modules like rfm 73 or nrf24 do provide a lot of > these fuctions, saving quite some development time. > And if it is just about point to point serisl, i'd suggest using > bluethooth modules. > Joep > > Op vrijdag 15 februari 2013 schreef Oliver Seitz ([email protected]) > het volgende: > > >> It seems it usually requires a little overhead, because transmitter and >> receiver need to sync, exchanging lots of 0s and 1s. RFM documentation >> says: "ASK receivers require a burst of training pulses to synchronize the >> transmitter and receiver, and also requires good balance between 0s and 1s >> in the message stream in order to maintain the DC balance of the message. >> UARTs do not provide these". >> >> >> I haven't done anything like this yet, but it sounds like you'll end up >> at something like manchester-code. >> >> Greets, >> Kiste >> >> -- >> You received this message because you are subscribed to the Google Groups >> "jallib" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/jallib?hl=en. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > -- > You received this message because you are subscribed to the Google Groups > "jallib" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/jallib?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- Sébastien Lelong -- You received this message because you are subscribed to the Google Groups "jallib" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/jallib?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
