diff options
Diffstat (limited to 'lib/support/drivers/gas.lua')
| -rw-r--r-- | lib/support/drivers/gas.lua | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/support/drivers/gas.lua b/lib/support/drivers/gas.lua new file mode 100644 index 0000000..a056759 --- /dev/null +++ b/lib/support/drivers/gas.lua @@ -0,0 +1,20 @@ +local device = _G +local RD_GAS = string.char(0x01) +local char000 = string.char(0,0,0) + +api={} +api.get_gas = {} +api.get_gas.parameters = {} --no parameter +api.get_gas.returns = {[1]={rname="gas level", rtype="number"}} --one return +api.get_gas.call = function () + local get_payload = RD_GAS + device:send(get_payload) + local response = device:read(3) + if not response then + print ('WARN: api.get_gas.call failure on device:read(3)') + response=char000 + end + local raw_val = string.byte(response, 2) + 255*string.byte(response, 3) + return raw_val +end + |