With the RF12Demo sketch running on a TinySensor permanently hooked to my Raspberry Pi, my next step was to be able to capture the RFM12B packets that are being sent by various remote sensors in my home. Using the minicom…
RF12 Demo sketch for ATtiny84
I ported the RF12Demo sketch by Jeelabs to use with the TinySensor. My plan is to have it run while the TinySensor is connected to RaspBerry Pi’s UART so that I can both receive and send data packets. A PHP script…
Running the Attiny84 @ 4Mhz with the internal oscillator
I am experimenting with running the TinySensor at 4Mhz with power saving in mind. There is a really nice article on power saving techniques here that also was an inspiration. The 4Mhz is the lowest possible limit for the RFM12b…
Two-way serial communication between Raspberry Pi and a TinySensor
My first version of this was one-way only i.e. the TinySensor sending data to the Raspberry Pi. This is due to the limitation in the Serial implementation in the tiny core, only TX is implemented for debug purposes. I have…
Fix for TinySensor v1.3’s ISP connector
As I mentioned in my TinySensor 1.3 PCB announcement, I have an error that prevents the ISP connector from being used. Of course, you can always take the Attiny84 out (if you use a socket) and program it with another…
Interfacing RFM12B to Raspberry Pi for cheap
I managed to interface one of my TinySensors to my Raspberry Pi via Pi’s UART. The idea is to use it to receive RFM12b transmissions and re-transmit on Pi’s UART where a serial gateway will pick the data and post to…
TinySensor PCB is ready
I have received 15 TinySensor v1.3 PCBs yesterday and am running tests. So far the ISP connector cannot be used because of a mistake I made on the PCB, but I assume this is fixable. I had to program the…
TinySensor’s SD card power consumption worries (and solution)
One of the things that has been bugging me recently is the power consumption of the SD card that I now have in the Tiny Sensor v1.2 design. I intend to power the sensor either via an external source (2xAA…
Toying with ATTiny84 and SD card in Arduino IDE
As I mentioned in my previous post, I tossed in a SD card port for the TinySensor v1.1. I wanted to give it a live test and see if/how it works prior to submitting the PCB to the fab house. So I…
The Tiny Sensor gets a SD card port
I had some space left on the TinySensor v1.0 PCB, plus I left myself few days to think before ordering the first batch, so I decided to throw in a SD card port. I didn’t want it to be anything…
Tiny Sensor plans
I have been working this weekend on improved version of the ATTiny84 remote sensor, this time I will use a PCB fab house to make at least 15 pcs of the PCB. The improvements over the old hand-made PCB are:…
Single sided ATtiny84 temperature sensor PCB
Following the fiasco with the first version of the PCB, I have decided to create a single sided PCB so that the DIP socket that was causing me trouble is on the top. Here are the results, the PCB works…
Remote sensor’s PCB is a failure :(
Apart from the pathetic etching job on the PCB I described yesterday, I found out this morning that I also managed to etch the kitchen sink and made wife unhappy. It have been warned not to pour ferric tri-chloride in…
Home made PCB for the remote temperature sensor
As I mentioned in my other post, I wanted to re-do the temperature sensor, this time on my own PCB. Driven by the hunger for instant gratification, I have overcome my fear of home-made PCBs using toner transfer and ferric…
The ATtiny84 remote sensor gets and upgrade from single analog to multiple digital temperature sensors
I intended to use the ATtiny84 remote RFM12B sensor to measure my solar hot water tank, but once the temperature reached 57.05, it wouldn’t measure any higher. I assume this is due to the 1.1V reference limit used to measure,…