Hardware

Sensor DHT-11

I hope too. Good luck with that.

calibration of these "cheap" sensors is always the main problem of reliable measurements, they are mostly good at giving a trend more than the actual measurement

Good to know when I'm going to receive mine...

There's a library specifically designed to work with them: https://github.com/Sofcom/NRF24Lmodule-SE8R01 Also found another interesting library for working with other, different, "clones" of the nRF24L01: https://github.com/jnk0le/RFM7x-lib

Great thread.

@Nca78 said in Anyone using a low-voltage motor controller?: @NeverDie how low is the voltage ? L9110 can go down to 2.5V and is ultra cheap on ali, else there are also plenty of DRV8833 (min 2.7V) breakout boards it seems ? Thanks! :) They're so cheap that I ordered both of them just to have them on hand for the future: https://www.aliexpress.com/item/DRV8833-2Channel-DC-Motor-Driver-Module-Board-1-5A-3V-10V/32709948530.html?spm=a2g0s.9042311.0.0.9ar2Ko and https://www.aliexpress.com/item/10pcs-lot-L9110S-DC-Stepper-Motor-Driver-Board-H-Bridge-L9110-for-arduino-Free-Shipping-Dropshipping/32251090078.html?spm=a2g0s.9042311.0.0.9ar2Ko Meanwhile, for expediency, I ordered two different kinds from Pololu: https://www.pololu.com/product/2990 and https://www.pololu.com/product/2960

@JWB I think you should try to ask in his topic to get a reply ;) that said, his design files are not from Eagle.

@Nca78 Thank you for your answer! I wil test and I will update, if any... For the capacitors, yes, I use 40V rated. What's your hint on select them? Thank you another time :)

Hi...i am a new user here. I built a RFM69 gateway and a node.I decided to place the RFM69 node in a basement storage room. The room has been flooded a few times historically, so being able to monitor humidity in the room seems like a good idea.The room has thick brick walls, which the RFM69-433MHz radio is much more capable to handle than the nrf24. Still, I wanted to keep an eye on the signal strength. Because of this, I added code to the gateway to report RSSI from the node. circuit card assembly

For the charger: http://www.ebay.com/itm/MPPT-Solar-Controller-3S-12-6V-Lithium-Battery-Charging-18650-Charger-Module-zhn-/332313023330 For the battery: http://www.ebay.com/itm/1-3S-11-1V-25A-W-Balance-Li-ion-Lithium-18650-Battery-BMS-PCB-Protection-Board-/272761561101 You need a balancer to charge Li-Ion batteries in series, hence the addon board. It also protects against overcharging, over-discharging and overcurrent. You could also buy a battery pack with integrated balancer/protection: http://www.ebay.com/itm/Portable-DC-12V-20000mAh-Li-ion-Super-Rechargeable-Battery-Pack-US-Plug-Lot-MU-/162662798231

@maciej initialization of the radio failed. Quadruple check your wiring, assure the radio is powered from a stable 3v3 supply. If all looks fine test with another module.

Just minutes ago i got it working on the ZERO/M0 MO, MI and SCK connect to the ICSP pin header: https://www.arduino.cc/en/uploads/Reference/ICSPHeader.jpg the CE and CS on defined pins example: #define MY_RF24_CE_PIN 9 // specific for my arduino zero #define MY_RF24_CS_PIN 10 // specific for my arduino zero Thanks

@Samuel235 Nice with the same circuit right?? which is in 2nd pic?

Thank you guys, I will just update the gw without messing with the node

@NeverDie Perhaps but the design is a bit too simple and unoriginal. I'd have to clean up the files a bit and I haven't touched Eagle since I made this board several years ago.