Exploring the universe on a 200€/month budget
First battery-powered test, GPS delay acquisition
The first battery-powered test was successful, in the sense that the board was working. However, I was surprised to see that the GPS was unable […]
almabraxas
First successful satellite transmission
The first satellite transmission was successful (and lesson full). The message “toto” was sent from the modem to the web site using the satellite gateway. […]
SD card logging working
I’m using SdFat (very simple, works very well). I’ve in SdFatConfig, that is using native Teensy SPI library since I think it’ll perform better than […]
BMP 180 pressure and temperature sensor
Got a BMP 180 in the mail today. It’s 3.3 volts only (simpler card than my previous Adafruit breakout), so I power it from the […]
First smooth working of both UARTs simultaneously and external power circuit
I got the modem + GPS + USB logging working smoothly. I’m stepping away from ChibiOs for now, because I can get something working well […]
Power level sensor
The stuff is supposed to be powered by a 9V battery, and I’m gonna use an ADC port on the Teensy to sense the available […]
Teensy 3.1 + ChibiOs + non-blocking Serial
Take away: you can use multiple Serial I/O in Greiman’s ChibiOs port in various tasks without giving it much thought, it will work without tasks […]
satellite modem – MCU communication problem solved
I started by replacing the modem with a trusty GPS, so I have a continuous flow of data with a checksum (GPS lines are checksumed) […]
Rockblock satellite modem to Teensy MCU UART communication problem (multiple power sources)
I’m using an mk1 rockblock modem, which is using a sub 0,1″ connector, thus I got a special cable with the kind help of Rock7mobile. […]
More on the pressure sensor, battery level display, satellite modem status LED, decoupling capacitors
Problems with the computation of pressure / altitude are solved (debugged with a mix of comparing the results with the Arduino output and using Bosch […]