OpenLager 4 Bit SD Card Data Logger Interface Clocked at 19.2MHz with DMA for RC Quadcopter Flight Controller

Specification Brand OpenLagerItem Name SD CardSize 19 15mmWeight 10gFeatures 1 It s faster 4 bit SD interface clocked at 19 2MHz with DMA 2 It has buffer memory to ride out times when the SD card is busy 125kbytes in current firmware 3 It fits in a smaller form factor 4 ESD protection series resistors on input pins 5 And it has a flip up microSD connector that is better at retaining the card in crashes and hard landings 6 OpenLager is easy to use with async serial First wire according to the diagram below an example of an OpenPilot style connector is in the drawing Note that you should attach the flight board s TX to openlager s RX pin Step OpenLager has an onboard regulator and can be powered with 3 3 5 5V the regulator dropout voltage is low enough that the SD card will still work properly at 3 3V input Next insert an microSD card and apply power Recommended card Extreme Pro 8GB Remove power remove the card and attach it to your computer You ll find openLager has written a file to it called lager cfg startupMorse useSPI false baudRate 2000000 preallocBytes 104857600 preallocGrow false The important field to change is baudRate set it to the speed of the serial you ll be using for logging dRonin supports 115200 250000 1500000 2000000 and 2470000 bits per second Cleanflight prefers 250000 bits per second etc The green LED is on always when power is applied and the red LED blinks with activity when the card is wr