Zydog, Thank you for you comment. Building removing all power consuming elements is one of the keys. For low power you cal remove all regulators and DC power converters if any. Powering with 2 AA/AAA provide 3V which can be fine, but take space The DHT11 is not the best sensor since it's slow and consuming power during conversion but with 2 AA/AAA it should works quite long as soon as you disable the sensor during low power sleeping mode. For ULPNode I'm working also on Gateway, currently an Arduino like but still testing with Spark Core / now particle and even ESP8266, they have more flash/ram add allow the gateway to do some other things such as displaying on a LCD/OLED

@Charles No problem ! And thank you for this board.

@CuriousCat the original blog article has been updated, you can look into if you neeed more information.

partially resolved - commands have to beexecuted as sudo old 1306 drivers don't work, I have to use new driver lib and display no. 6 (no idea why, but anyway...).

my family was looking for Acord 25 earlier this week and located an excellent service that has a searchable database . If others want Acord 25 also , here's http://goo.gl/ZkI6Nf