I recently bought this board and tried to get the example StalkerV30_DataLogger_10Sec.ino running.
Two problems emerged:
- (1) “SD card not initialized”, I got this error 90% of the time with the 4GB SD card that was supplied with the kit.
- (2) Strange characters in the serial output
Kind of solutions for these:
(1) I replaced the SD card with a different one I had and the error disappeared.
Question remains how this can happen, especially with a SD card that is included in the kit.
(2) I recognized strange characters for earlier sketches so I lowered the serial speed to 9600 to be on the save side. The problem remained. Than I increased the interrupt interval and delays in the sleep routine: first from 10 to 15 (results were a bit better), than from 15 to 20. Only some strange readings in the beginning and than the best stable results. Only 1 out of 10 lines I see 4 to 6 characters that are strange.
How can I fix this to 100% good?
What causes this problem?
Any help to understand this would be appreciated.