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Lgbeno

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Everything posted by Lgbeno

  1. http://www.digirf.com/EN/ProView/80.html Sent from my iPhone using Tapatalk
  2. Sounds ambitious... First, changing frequency isn't trivial, you would need to change out antennas and matching components for each node. If Money is not an issue, separate hardware is better. Between narrowband and LoRa, I think that either can yield very high performance and you are best off making a choice and sticking with it. Coding up two separate libraries and testing is a full time job for 6 months (or more). As far as I know, a Energia abstraction for CC1120 does not exist nor does a lib exist for LoRa. It would be great for the community if you were to write one. At l
  3. Many different tricks to do this, the ones mentioned above are good. Additionally I recommend using solder paste. Its glorious combination of solder and flux ensures that you get good solder coverage. Handy in whatever solder scenario. You can do a toaster reflow too, dab on some paste then 2 min at 250 deg f, 3 min at 450 deg F. I use two different toaster ovens that I bought for $5 each at the thrift shop. Works surprisingly well. Sent from my iPhone using Tapatalk
  4. Yeah that would be a welcome change, by "medium" I mean like 1000 pcs or more. It would be interesting to know if a single production product is using DIP! I'm not a DIP guy myself, I usually use 32QFN. Sent from my iPhone using Tapatalk
  5. Good points, i do also wish price was lower. Newark does a decent just with discounts but still 1.50 for g2553 is quite high (i still pay it) The problem is that if TI was to offer the part priced super low in low volume then it would screw up their medium volume pricing. There should be a hobby distributor with a Max order quantity for TI to fuel hobbyists. Sent from my iPhone using Tapatalk
  6. So I often find myself asking this question: I use the original launchpad almost exclusively with MSP440G2553. I know that there are lower cost, more capable parts out there but every time I go back to the old reliable G2553. Do others on the forum find this to be true for them as well? Theres just something about the part that is so familiar and comfortable. Honestly I think that it is the user guide. I was trying to use timer in AVR recently and was going through the docs and thought I could have already had this done with G2553! Also one other random rant: If it wasn't fo
  7. WiFi Sensor tag would be very cool. Would be the prefect opportunity to have demo code to push data to analog.io! Sent from my iPhone using Tapatalk
  8. Check out http://forum.43oh.com/index.php?/topic/8274-Cheap-solar-battery-%2B-wireless-IoT-node Sent from my iPhone using Tapatalk
  9. Good project, I believe that the best way to test is to start building! I'm building some WSN's with lesser hardware so you can for sure do it with this. The biggest thing for me is to be sure that the hardware that you select has a good software library so that you don't need to write one yourself which is a big time sink. The other major item for me is cost. The cheaper the node, the more that you can deploy! All things considered, these parts are inexpensive but there are cheaper with adequate trade offs. Sent from my iPhone using Tapatalk
  10. Those are really good ideas, I'll see what I can do Sent from my iPhone using Tapatalk
  11. I've been having some fun recently with a pretty simple board. I mentioned it last week on this thread. It is really inspired by @@cubeberg who has done a lot more work with bridging nRF24 communications back to the cloud then I have. He's using CC3200 but I wanted to try continue some work that I have been doing with ESP8266 and MQTT. Both technologies are freakishly cool! The basic premise is that sensor nodes are powered by a single AAA battery, then I use a TPS61097A-33DBVT to boost the voltage to 3.3V. From there I power up a MSP430G2553 running some code that I wrote in Energia.
  12. Also msp430 should be more than adequate esp8266 could be used for wifi. Also consider a hose with pressure sensor as used in many traffic counters and speed detectors Sent from my iPhone using Tapatalk
  13. Magnets and hall efects for open and close detection. Maybe https://www.tindie.com/products/limpkin/hb100-doppler-module-with-backpack-1/ for obstruction? Sent from my iPhone using Tapatalk
  14. Having some fun with nRF24 today. This library is so easy to use, thanks @@spirilis Sent from my iPhone using Tapatalk
  15. http://www.mouser.com/Search/m_ProductDetail.aspx?Techspray%2f2108-12S%2f&qs=sGAEpiMZZMvJqaFk9BIiv4zFCTyhAuSzRGnZB8oiqmU%3d You might want to look at this. I don't think it will make it water proof but will greatly reduce environmental exposure. You can burn it off with a solder iron (dont' inhale fumes) or i saw a remover pen on time. Sent from my iPhone using Tapatalk
  16. http://outdoorproducts.com/watertight-boxes/ Yes, i,ve had one in my mouser shopping cart for a long time at $25 then Saw these, quickly tossed 4 in the card and my wife just looked at me strangely. Its polycarbonate as far as I know that stuff does well in the sun. Im sure it will ultimate breakdown but it will take years. Sent from my iPhone using Tapatalk
  17. I found a great water proof enc at Menards today for about $6.85 (does not include the 11% rebate!). Way cheaper that what I could find on digikey & mouser! Sent from my iPhone using Tapatalk
  18. PM me your address and I'll donate to you one of my ESP8266 Dev boards. You've shared so much with the 43oh community, you deserve one! I'll help you out if you have ESP8266 questions too.
  19. Well there is always this one http://www.newark.com/texas-instruments/msp430g2302in20/microcontroller-mcu-16-bit-msp430/dp/24T4680 Those are crazy prices. For fun I did a search on Digikey and found a SiLabs EFM8 for 35 cents, crazy... Anyway, I digress but I was able to get the current sensing up and running in my solar light. It looks like there is plenty of power being produced.
  20. Awesome! @@dubnet, I sent you a PM and cubeburg, I'll send an email. I've been testing the supplies for about 24 hours now and still going strong. First I tested the voltage output, then I hooked up one of my Droplet Wireless temp sensors. It is setup to transmit every 10 seconds and keeps chugging along. Here's the data: Next I'll add current and voltage measurements Voltage Output: Solar Cell Current (battery voltage is 1.248V) The final product: The particular light that I bought from Home Depot had a nice area inside of it for Electronics. So far thi
  21. This one actually uses TPS61097A-33 it is a boost mode only regulator. Should be perfect for any single cell application. Sent from my iPhone using Tapatalk
  22. These are low Iq boost converters so that you can run a msp430 off of a single AAA like the ones in these cheap solar lights. Sent from my iPhone using Tapatalk
  23. CCS in the cloud is also a good option for Mac Users IMO. ccs.ti.com/ide
  24. Just got the boards from OSHpark today, it sort of caught me off guard because I didn't order parts yet! Any way one massive Digikey order later (for about 4 other projects II'll be in action next week Going to build 20 and see where that goes, I have a solar light to test it out on as well. TPS61097A-33 = $1.81 Caps = $0.13 Inductor = $0.125 PCB = $0.17 ---------------------------- Total $2.235 For 43oh friends $3 each should be good plus $2 to ship as many as you buy in the US $3 for international. Just leave a
  25. I transmit every 5 minutes, the payload is about 30 bytes and I don't have a protocol that ensures message delivery. For me this is ok because it is just temperature and humidity data and it doesn't change very fast. Honestly I was thinking 140uA was rather high, some day I would look into using LPM3 with VLO, that and the sleep current of the radio and sensor should get me into the 10's of uA. It's all about current consumption when sleeping because thats what the sensor does 99% of the time
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