I've been struggling to connect my GY-86 sensor board (containing MS5611 baro, HMC5883l compas and MPU6050 Acc+Gyro sensors) to an Arduino Pro Mini 5v/16Mhz.
My sensor board is exactly the one from the pictures in this older topic: viewtopic.php?f=6&t=2269#p20967 I'm stressing this because I've seen other similar boards on the net with the same sensor chips but with different pin labels and differences in accepted power and I/O pin voltages, with or w/o I2C pull-ups, etc.
I figured out so far how to connect power and I2C bus (SDA/SCL) to Arduino and I'm able now to get sensor readings using a simple arduino sketch I've created myself from bits and pieces found on the net. Have not tried loading the multiwii firmware yet, but that will follow soon.
My question is related to the remaining pins of this sensor board: FSYNC, INTA, DRDY. Where should they go? So far I kept them unconnected. Can they be used to improve accuracy and speed of sensor reading? Ther's a previous related topic (viewtopic.php?f=6&t=2269#p20967 ) but this question remained unanswered. Does anybody know? I realise the current Multiwii firmware might not be able to take advantage of them, but I'm still very curious to know
.One possible answer could come from the schematic diagram of those more recent Multiwii boards based on Atmel328p+MPU6050+MS5611+HMC5883l - I think these are advertised as version 2.5. Does anybody have those schematics? I could only find schematics going up to version 1.9 which are too old, none of those is based on MPU6050 and MS5611.
Many thanks!