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DuetWebAPI.py
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# Python Script containing a class to send commands to, and query specific information from,
# Duet based printers running either Duet RepRap V2 or V3 firmware.
#
# Does NOT hold open the connection. Use for low-volume requests.
# Does NOT, at this time, support Duet passwords.
#
# Not intended to be a gerneral purpose interface; instead, it contains methods
# to issue commands or return specific information. Feel free to extend with new
# methods for other information; please keep the abstraction for V2 V3
#
# Copyright (C) 2020 Danal Estes all rights reserved.
# Released under The MIT License. Full text available via https://opensource.org/licenses/MIT
#
# Requires Python3
class DuetWebAPI:
import requests
import json
import sys
pt = 0
_base_url = ''
def __init__(self,base_url):
self._base_url = base_url
try:
URL=(f'{self._base_url}'+'/rr_status?type=1')
r = self.requests.get(URL,timeout=(2,60))
j = self.json.loads(r.text)
_=j['coords']
self.pt = 2
return
except:
try:
URL=(f'{self._base_url}'+'/machine/status')
r = self.requests.get(URL,timeout=(2,60))
j = self.json.loads(r.text)
_=j['result']
self.pt = 3
return
except:
print(self._base_url," does not appear to be a RRF2 or RRF3 printer", file=self.sys.stderr)
return
####
# The following methods are a more atomic, reading/writing basic data structures in the printer.
####
def printerType(self):
return(self.pt)
def baseURL(self):
return(self._base_url)
def getCoords(self):
if (self.pt == 2):
URL=(f'{self._base_url}'+'/rr_status?type=2')
r = self.requests.get(URL)
j = self.json.loads(r.text)
jc=j['coords']['xyz']
an=j['axisNames']
ret=self.json.loads('{}')
for i in range(0,len(jc)):
ret[ an[i] ] = jc[i]
return(ret)
if (self.pt == 3):
URL=(f'{self._base_url}'+'/machine/status')
r = self.requests.get(URL)
j = self.json.loads(r.text)
ja=j['result']['move']['axes']
#d=j['result']['move']['drives']
#ad=self.json.loads('{}')
#for i in range(0,len(ja)):
# ad[ ja[i]['letter'] ] = ja[i]['drives'][0]
ret=self.json.loads('{}')
for i in range(0,len(ja)):
ret[ ja[i]['letter'] ] = ja[i]['userPosition']
return(ret)
def getLayer(self):
if (self.pt == 2):
URL=(f'{self._base_url}'+'/rr_status?type=3')
r = self.requests.get(URL)
j = self.json.loads(r.text)
s = j['currentLayer']
return (s)
if (self.pt == 3):
URL=(f'{self._base_url}'+'/machine/status')
r = self.requests.get(URL)
j = self.json.loads(r.text)
s = j['result']['job']['layer']
if (s == None): s=0
return(s)
def getG10ToolOffset(self,tool):
if (self.pt == 3):
URL=(f'{self._base_url}'+'/machine/status')
r = self.requests.get(URL)
j = self.json.loads(r.text)
ja=j['result']['move']['axes']
jt=j['result']['tools']
ret=self.json.loads('{}')
to = jt[tool]['offsets']
for i in range(0,len(to)):
ret[ ja[i]['letter'] ] = to[i]
return(ret)
return({'X':0,'Y':0,'Z':0}) # Dummy for now
def getNumExtruders(self):
if (self.pt == 2):
URL=(f'{self._base_url}'+'/rr_status?type=2')
r = self.requests.get(URL)
j = self.json.loads(r.text)
jc=j['coords']['extr']
return(len(jc))
if (self.pt == 3):
URL=(f'{self._base_url}'+'/machine/status')
r = self.requests.get(URL)
j = self.json.loads(r.text)
return(len(j['result']['move']['extruders']))
def getNumTools(self):
if (self.pt == 2):
URL=(f'{self._base_url}'+'/rr_status?type=2')
r = self.requests.get(URL)
j = self.json.loads(r.text)
jc=j['tools']
return(len(jc))
if (self.pt == 3):
URL=(f'{self._base_url}'+'/machine/status')
r = self.requests.get(URL)
j = self.json.loads(r.text)
return(len(j['result']['tools']))
def getStatus(self):
if (self.pt == 2):
URL=(f'{self._base_url}'+'/rr_status?type=2')
r = self.requests.get(URL)
j = self.json.loads(r.text)
s=j['status']
if ('I' in s): return('idle')
if ('P' in s): return('processing')
if ('S' in s): return('paused')
if ('B' in s): return('canceling')
return(s)
if (self.pt == 3):
URL=(f'{self._base_url}'+'/machine/status')
r = self.requests.get(URL)
j = self.json.loads(r.text)
return(j['result']['state']['status'])
def gCode(self,command):
if (self.pt == 2):
URL=(f'{self._base_url}'+'/rr_gcode?gcode='+command)
r = self.requests.get(URL)
if (self.pt == 3):
URL=(f'{self._base_url}'+'/machine/code/')
r = self.requests.post(URL, data=command)
if (r.ok):
return(0)
else:
print("gCode command return code = ",r.status_code)
print(r.reason)
return(r.status_code)
def getFilenamed(self,filename):
if (self.pt == 2):
URL=(f'{self._base_url}'+'/rr_download?name='+filename)
if (self.pt == 3):
URL=(f'{self._base_url}'+'/machine/file/'+filename)
r = self.requests.get(URL)
return(r.text.splitlines()) # replace('\n',str(chr(0x0a))).replace('\t',' '))
def getTemperatures(self):
if (self.pt == 2):
URL=(f'{self._base_url}'+'/rr_status?type=2')
r = self.requests.get(URL)
j = self.json.loads(r.text)
return('Error: getTemperatures not implemented (yet) for RRF V2 printers.')
if (self.pt == 3):
URL=(f'{self._base_url}'+'/machine/status')
r = self.requests.get(URL)
j = self.json.loads(r.text)
jsa=j['result']['sensors']['analog']
return(jsa)
####
# The following methods provide services built on the atomics above.
####
# Given a line from config g that defines an endstop (N574) or Z probe (M558),
# Return a line that will define the same thing to a "nil" pin, i.e. undefine it
def _nilEndstop(self,configLine):
ret = ''
for each in [word for word in configLine.split()]: ret = ret + (each if (not (('P' in each[0]) or ('p' in each[0]))) else 'P"nil"') + ' '
return(ret)
def clearEndstops(self):
c = self.getFilenamed('/sys/config.g')
for each in [line for line in c if (('M574 ' in line) or ('M558 ' in line) )]: self.gCode(self._nilEndstop(each))
def resetEndstops(self):
c = self.getFilenamed('/sys/config.g')
for each in [line for line in c if (('M574 ' in line) or ('M558 ' in line) )]: self.gCode(self._nilEndstop(each))
for each in [line for line in c if (('M574 ' in line) or ('M558 ' in line) or ('G31 ' in line))]: self.gCode(each)
def resetAxisLimits(self):
c = self.getFilenamed('/sys/config.g')
for each in [line for line in c if 'M208 ' in line]: self.gCode(each)
def resetG10(self):
c = self.getFilenamed('/sys/config.g')
for each in [line for line in c if 'G10 ' in line]: self.gCode(each)