URLs and Commands

Both HeaterMeter and LinkMeter accept commands via URL-type form.

HeaterMeter URLs

• Received via serial
• No authentication
• Begin with a forward slash (/)
• End with CR or CR/LF
• Maximum length: 64 characters
• Do not URL encode parameters

LinkMeter URLs

• Received via HTTP
• Authentication possible
• Begin with /luci/
• URL encoded parameters OK

URL	Description	LM	HM
/lm/	Main index or LinkMeter "home" page. Displays current temperature and fan status with graph. rrd=file use file from stashpath instead of live	Y	N
/lm/login	Bounce to the LinkMeter login page for authentication.	Y	N
/lm/set	Passed through to HeaterMeter one parameter at a time. See HeaterMeter Set Parameter list.	A	Y
/admin/lm/conf	LinkMeter probe and behavior configuration. Front-end to /lm/set	A	N
/admin/lm/home	Bounce to /lm/	A	N
/admin/lm/stashdb	LinkMeter utility URL for managing databases backup=1 backup to stashpath restore=1 restore to active reset=1 reset active rrd=file use file instead of 'hm.rrd' for stashpath file	A	N
/admin/lm/archive	LinkMeter database archive. Front-end to /admin/lm/stashdb	A	N
/admin/lm/fw	LinkMeter Arduino / AVR firmware upgrade	A	N
/admin/lm/credits	LinkMeter software credits page	A	N
/reboot	HeaterMeter software reboot	N	Y
/config	HeaterMeter dump configuration	N	Y

HeaterMeter Set Parameters

The definitive source on HeaterMeter set parameters is the HeaterMeter README. All set parameters are proceeded by /set? followed by the parameter name. HeaterMeter only supports one setting one parameter at a time, LinkMeter can set several parameters at once.

Name	Description
sp=A	Set the setpoint to integer A
pidA=B	Tune PID parameter A to value float B. A can be b (bias), p (proportional), i (integral), or d (derivative)
pnA=B	Set probe name A to string B.
poA=B	Set probe offset A to integer B.
pcN=A,B,C,R,TRM	Set the probe coefficients and type for probe N. Any of A,B,C,R,TRM set to 0 will not be modified. A, B, and C are the Steinhart-Hart coeffieicents and R is the fixed side of the probe voltage divider. A, B, C and R are floating point and should be specified in scienfific noation, e.g. 0.00023067434 -> 2.3067434e-4. TRM is either the type of probe OR an RF map specifier. If TRM is an integer, it indicates a probe type. Probe types are 1=Disabled, 2=Internal, 3=RFM12B. If the first character of TRM is a capital letter A-Z followed by a single digit number 0-5, it is considered an RF Map item <rfSource (letter)>. e.g. a TRM of B0 sets this probe to use RF Source B pin 0. If an RF map is present, the probe type is automatically switched to type RFM12B.
lb=A	Set the LCD backlight to A. Range is 0 (off) to 255 (full)
pnXXX	Retrieve the current probe names (XXX is literally the string "XXX")

Probe Number	Description
0	Pit - This is the probe that controls the blower
1	Food Probe 1
2	Food Probe 2
3	Food Probe 3 / Ambient

Probe Type (URL)	Probe Type (Code)	Description
0	(Undefined)	Do not change probe type
1	PROBETYPE_DISABLED (0)	Disabled. Do not measure or report a value for this probe
2	PROBETYPE_INTERNAL (1)	Internal. Probe connected directly to HeaterMeter via voltage divider / probe jack / thermistor
3	PROBETYPE_RF12 (2)	RFM12B. RF Wireless via RFM12B radio transciever. Probes of this type also require an RFMap item to map the appropriate source node and pin.