diff options
Diffstat (limited to 'sen5x.lua')
| -rw-r--r-- | sen5x.lua | 42 |
1 files changed, 42 insertions, 0 deletions
@@ -2,6 +2,7 @@ local sen5x = {} local device_address = 0x69 sen5x.bus_id = 0 +sen5x.status = "Initializing" function sen5x.start() i2c.start(sen5x.bus_id) @@ -62,6 +63,47 @@ function sen5x.read() return true end +function sen5x.prepare_read_status() + i2c.start(sen5x.bus_id) + if not i2c.address(sen5x.bus_id, device_address, i2c.TRANSMITTER) then + return false + end + i2c.write(sen5x.bus_id, {0xd2, 0x06}) + i2c.stop(sen5x.bus_id) + return true +end + +function sen5x.read_status() + i2c.start(sen5x.bus_id) + if not i2c.address(sen5x.bus_id, device_address, i2c.RECEIVER) then + return false + end + local data = i2c.read(sen5x.bus_id, 6) + i2c.stop(sen5x.bus_id) + if not sen5x.crc_valid(data, 6) then + return false + end + local status1 = string.byte(data, 1) + local status2 = string.byte(data, 5) + + if bit.isset(status1, 5) then + sen5x.status = "Fan speed out of range" + elseif bit.isset(status1, 3) then + sen5x.status = "Fan cleaning active" + elseif bit.isset(status2, 7) then + sen5x.status = "Gas sensor error" + elseif bit.isset(status2, 6) then + sen5x.status = "RHT sensor error" + elseif bit.isset(status2, 5) then + sen5x.status = "Laser failure" + elseif bit.isset(status2, 4) then + sen5x.status = "Fan failure" + else + sen5x.status = "OK" + end + return true +end + function sen5x.prepare_get_product() i2c.start(sen5x.bus_id) if not i2c.address(sen5x.bus_id, device_address, i2c.TRANSMITTER) then |