SPS30 error checsum

[roberbike]

I found that some times the sensor show me some errors:

->[SLIB] attempt enable sensor : SPS30 -->[SLIB] SPS30 Serial number : 3D59CD669A90A7EB -->[SLIB] SPS30 product name : 00080000 -->[SLIB] SPS30 firmware level : 2.1 -->[SLIB] SPS30 Hardware level : 0 -->[SLIB] SPS30 SHDLC protocol : 0.0 -->[SLIB] SPS30 Library level : 1.4 -->[SLIB] SPS30 Detected SPS30 via I2C. -->[SLIB] SPS30 Measurement OK -->[SLIB] sensor registered : SPS30 :D

Here the error:

[E][SLIB] SPS30 error msg : Protocol error -->[SLIB] AM2320 read : done! -->[HEAP] LOOP bytes used : 5860b/052Kb -->[SLIB] Sensors devices count : 2 (SPS30,AM232X,) -->[SLIB] Sensors units count : 6 (PM1,PM2.5,PM4,PM10,T,H,) -->[SLIB] Preview sensors values : PM1:18.0 PM2.5:20.0 PM4:20.0 PM10:20.0 T:20.0 H:38.3 -->[SLIB] SPS30 read : done! -->[SLIB] AM2320 read : done! -->[HEAP] LOOP bytes used : -1768b/054Kb -->[SLIB] Sensors devices count : 2 (SPS30,AM232X,) -->[SLIB] Sensors units count : 6 (PM1,PM2.5,PM4,PM10,T,H,) -->[SLIB] Preview sensors values : PM1:19.0 PM2.5:20.0 PM4:20.0 PM10:20.0 T:20.0 H:37.1 -->[MQTT] Anaire cloud published : payload size: 197 -->[IFDB] CanAirIO cloud write : payload size: 48

other example with more info: 11:46:13.149 > -->[SLIB] trying to load I2C sensors.. 11:46:13.155 > -->[SLIB] I2C SPS30 starting sensor.. 11:46:13.155 > I2C Sending: 0xD1 0x00 11:46:13.160 > I2C Received: 0x02 0x01 length: 2 11:46:13.160 > 11:46:13.160 > I2C Sending: 0xD0 0x33 11:46:13.166 > I2C Received: 0x33 0x44 0x35 0x39 0x43 0x44 0x36 0x36 0x39 0x41 0x39 0x30 0x41 0x37 0x45 0x42 0x00 0x00 length: 18 11:46:13.171 > 11:46:13.171 > -->[SLIB] SPS30 Serial number : 3D59CD669A90A7EB 11:46:13.276 > I2C Sending: 0xD0 0x02 11:46:13.276 > I2C Received: 0x30 0x30 0x30 0x38 0x30 0x30 0x30 0x30 length: 8 11:46:13.276 > 11:46:13.276 > -->[SLIB] SPS30 product name : 00080000 11:46:13.276 > I2C Sending: 0xD1 0x00 11:46:13.276 > I2C Received: 0x02 0x01 length: 2 11:46:13.276 > 11:46:13.276 > -->[SLIB] SPS30 firmware level: 2.1 11:46:13.276 > -->[SLIB] SPS30 Hardware level: 0 11:46:13.276 > -->[SLIB] SPS30 SHDLC protocol: 0.0 11:46:13.276 > -->[SLIB] SPS30 Library level : 1.4 11:46:13.276 > I2C Sending: 0xD3 0x04 11:46:15.196 > -->[SLIB] SPS30 Detected SPS30 via I2C. 11:46:15.202 > I2C Sending: 0x00 0x10 0x03 0x00 0xAC 11:46:16.197 > -->[SLIB] SPS30 Measurement OK 11:46:16.203 > -->[SLIB] I2C detected SPS30 sensor :)

And the error:

11:46:24.173 > -->[SLIB] AM2320 read > done! 11:46:24.254 > I2C Sending: 0x02 0x02 11:46:24.259 > I2C Received: 0x00 0x01 length: 2 11:46:24.259 > 11:46:24.259 > I2C Sending: 0x03 0x00 11:46:24.261 > I2C CRC error: Expected 0xE8, calculated 0xD0 11:46:24.267 > I2C Received: 0x41 0x5B 0x50 0xFB 0x41 0x67 0xEB 0x2F length: 8 11:46:24.273 > 11:46:24.273 > Error during reading from I2C: 0x51 11:46:24.277 > [E][SLIB] SPS30 Protocol error 11:46:24.298 > -->[SLIB] PM1:000 PM25:000 PM10:000 CO2:0000 CO2humi:0.000000% CO2temp:0.000000°C H:37.099998% T:18.700001°C 11:46:24.309 > -->[SLIB] new sample time: 15 11:46:39.264 > I2C Sending: 0x02 0x02 11:46:39.265 > I2C Received: 0x00 0x01 length: 2 11:46:39.265 > 11:46:39.265 > I2C Sending: 0x03 0x00 11:46:39.267 > I2C CRC error: Expected 0xFF, calculated 0xF8 11:46:39.273 > I2C Received: 0x41 0x97 0xDB 0x34 0x41 0xA0 0x95 0x0E 0x41 0xA0 0x95 0x07 length: 12 11:46:39.284 > 11:46:39.284 > Error during reading from I2C: 0x51 11:46:39.284 > [E][SLIB] SPS30 Protocol error 11:46:39.290 > -->[SLIB] Any data from sensors? check your wirings! 11:46:39.314 > -->[SLIB] PM1:000 PM25:000 PM10:000 CO2:0000 CO2humi:0.000000% CO2temp:0.000000°C H:37.099998% T:18.700001°C 11:46:41.998 > -->[MQTT] Anaire sensor payload published. (size: 194)

I am not sure if this is an issue or not. Thanks.

Reported also to : https://github.com/paulvha/sps30/issues/26

[roberbike]

After a few days of testing, it seems that the error has not recurred. A good and stable 5V power supply is essential.