Firmware Over The Air (FOTA) for ESP8266 SoC

With the IoT booming nowadays, the number of connected devices grows exponentially and so does the related software that drives them. There is no doubt that Firmware Over The Air (FOTA) is a highly desirable – if not required – feature for any embedded project/product both DIY or commercial. Being able to provide a remote…


Physical vs Virtual

The Raspberry Pi, a $35 credit card sized computer, is a popular choice for home automation projects. I am running few of those at home myself. But what is the true cost of these, is the advertised cost of $35 really all you spend?  Before you know it, you throw in  more bucks for a decent power…

Funky v3 with RFM69CW

Funky v3 with RFM69CW using LowPowerLab’s RF69 library

I’ve already blogged about using Funky v3 and RFM-2-Pi with the HopeRF RFM69CW module, only I used it with JCW’s Jeelib as I wanted to keep compatibility with my existing RFM12B based sensor network. JCW has done great job in providing compatibility with the RFM12B by tweaking the chip’s registers so that it becomes an easy replacement. Felixs’s…


Using RFM69CW instead of RFM12B

The rumors for RFM12B’s end-of-life two years ago seem to have been highly exaggerated now and the popular RF module is still available in abundance. HopeRF has introduced a pin-compatible upgrade, the RFM69CW. The module itself offers improved sensitivity and range compared to the RFM12B (+30%) at the cost of increased power consumption, making it probably a…


Speech generation with Node-RED

I am flooded with all sorts of notifications on my phone and that gets a bit annoying after time. Email, calendar, SMS, social apps, instant messengers, all sorts of push notification alerts and so forth mean I physically pick my phone to check what’s beeping probably 50+ times a day. One comes to the point to ignore…

The control UI on my phone

DIY Internet connected smart humidifier

I worked on creating a Internet connected humidistat last week using my open source WiFi relay project as platform. We observe quite dry air at our house, I suspect this is due to the fact that we use fan coils for heating/cooling. Humidity levels at home are usually below the 30% mark, which poses a health risk along with uncomfortably dry…

wordpress ifttt recipe

Making IFTTT (If This Then That) talk to Node-RED

IFTTT (short for “If This Then That”) is a popular service which lets you trigger actions based on certain events that occur around the Internet. It is missing an important functionality (IMHO), namely WebHooks. A WebHook is an HTTP callback: an HTTP POST that occurs when something happens; a simple event-notification via HTTP POST. I explain…


IoT tech talk recording

Thanks to all that participated in the IoT tech talk session that was held late yesterday, as promised I am adding a recording of the session It was suggested that the topic of the next hangout will be the ESP8266, I’ll set up some time and make an announcement post.   Page views: 2719