hello,
i just tested my mini thermal printer and found out these 2 issues, would be happy if you could help me solve them:
1) the test page prints out fine except the feed produces characters rather then just feeding the paper through the printer. it seems this occurs also on other functions, as the characters appear also on the top of the test page even with out feed being present (the characters are always the same "x(J")
2) the example sketch seems to print out ascii gibberish when trying to print the bitmap data
i am not sure which firmware my printer runs on, as i can not find any info about that other then "FW Version:1.00.48 NVT" - is this supposed to be the valid firmware? in the documentation and the sample sketches they usually contain just 3 numbers (e.g. 2.68)
thank you for you help!
thermal printer feed does not work properly, neither bitmap
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Please be positive and constructive with your questions and comments.
- einlagerfeuer
- Posts: 1
- Joined: Fri Oct 27, 2017 4:59 pm
- inonoob
- Posts: 1
- Joined: Thu Nov 02, 2017 3:35 pm
Re: thermal printer feed does not work properly, neither bit
Hey
I have the exact same issue as you described it. I dont't know what is wrong. I tried to fix it in the Adafruit_thermal.py but no luck so far. If I do the math 1 * 100 + 48 = 148 which I should put in the Adafruit_thermal.py but no changes either.
The printer is hooked to a Raspberry pi 2.
Maybe some else has the same issue.
my model: BT-2
Boot Version: 1.01.02
FW Version: 1.00.48 NVT
CG Version 1.00.2
Build date: Apr 19 2017
Build time: 23.18:41
Regards
Ino
I have the exact same issue as you described it. I dont't know what is wrong. I tried to fix it in the Adafruit_thermal.py but no luck so far. If I do the math 1 * 100 + 48 = 148 which I should put in the Adafruit_thermal.py but no changes either.
The printer is hooked to a Raspberry pi 2.
Maybe some else has the same issue.
my model: BT-2
Boot Version: 1.01.02
FW Version: 1.00.48 NVT
CG Version 1.00.2
Build date: Apr 19 2017
Build time: 23.18:41
Regards
Ino
- PixelDemon
- Posts: 1
- Joined: Thu Apr 05, 2018 9:11 am
Re: thermal printer feed does not work properly, neither bit
Hey all,
i have the exact same problem with "FW Version:1.00.48 NVT". Printing bitmap results in rubbish, linefeed prints "x(J".
Have you found a solution in the meantime? Can Adafruit staff say something about that?
Thanks!
i have the exact same problem with "FW Version:1.00.48 NVT". Printing bitmap results in rubbish, linefeed prints "x(J".
Have you found a solution in the meantime? Can Adafruit staff say something about that?
Thanks!
- Ramondes
- Posts: 1
- Joined: Sat May 12, 2018 4:02 pm
Re: thermal printer feed does not work properly, neither bit
Hello dear all,
I am facing the same problems. I would be glad if someone of the cracks could guide me out. My setup:
Arduino Mega
Adafruit mini thermal printer
The library given by Adafruit
I am facing the same problems. I would be glad if someone of the cracks could guide me out. My setup:
Arduino Mega
Adafruit mini thermal printer
The library given by Adafruit
- costelano
- Posts: 1
- Joined: Mon Aug 13, 2018 11:03 am
Re: thermal printer feed does not work properly, neither bit
The library is not adapted to the printer. To get rid of "x(J" you have to modify the Adafruit_Thermal.cpp from library.
Locate
and before closing bracket "}" insert the reset command again:
This problem is caused by that wrong commands for setting the printer (DTR, Density, etc)
If you need other printer functions you have to modify the library according to your printer Commands manual.
Locate
Code: Select all
void Adafruit_Thermal::begin
and before closing bracket "}" insert the reset command again:
Code: Select all
reset();
If you need other printer functions you have to modify the library according to your printer Commands manual.
- adafruit2
- Posts: 22149
- Joined: Fri Mar 11, 2005 7:36 pm
Re: thermal printer feed does not work properly, neither bit
did this get resolved? all the printers have slight variations - for raspberry pi please use the 'printer driver' technique, that works best we've found
- lcorrea
- Posts: 1
- Joined: Thu Oct 25, 2018 10:54 am
Re: thermal printer feed does not work properly, neither bit
Hi, to solve this try to remove the following lines from Adafruit_Thermal.cpp
in void Adafruit_Thermal::begin(uint8_t heatTime) {
.
.
.
writeBytes(11, heatTime, 40); // Heating dots, heat time, heat interval
and
writeBytes(ASCII_DC2, '#', (printBreakTime << 5) | printDensity);
Put a comment in front of theses lines
// writeBytes(11, heatTime, 40); // Heating dots, heat time, heat interval
and
//writeBytes(ASCII_DC2, '#', (printBreakTime << 5) | printDensity);
With theses changes it would be fine.
in void Adafruit_Thermal::begin(uint8_t heatTime) {
.
.
.
writeBytes(11, heatTime, 40); // Heating dots, heat time, heat interval
and
writeBytes(ASCII_DC2, '#', (printBreakTime << 5) | printDensity);
Put a comment in front of theses lines
// writeBytes(11, heatTime, 40); // Heating dots, heat time, heat interval
and
//writeBytes(ASCII_DC2, '#', (printBreakTime << 5) | printDensity);
With theses changes it would be fine.
- Va_Le
- Posts: 3
- Joined: Sat Aug 24, 2019 6:01 pm
Re: thermal printer feed does not work properly, neither bit
Hi there!
I have the same "x(J"-problem here; the printer prints that before anything..
I am using a Raspberry PI3B+ and did all the steps in the "Internet of Things Printer for Raspberry Pi"-Tutorial.
See also the Images attached:
Any ideas / help?
I have the same "x(J"-problem here; the printer prints that before anything..
I am using a Raspberry PI3B+ and did all the steps in the "Internet of Things Printer for Raspberry Pi"-Tutorial.
See also the Images attached:
Any ideas / help?
- Va_Le
- Posts: 3
- Joined: Sat Aug 24, 2019 6:01 pm
Re: thermal printer feed does not work properly, neither bit
I think my problem is anywhere inside the Adafruit_Thermal.py
here it is:
here it is:
Code: Select all
#*************************************************************************
# This is a Python library for the Adafruit Thermal Printer.
# Pick one up at --> http://www.adafruit.com/products/597
# These printers use TTL serial to communicate, 2 pins are required.
# IMPORTANT: On 3.3V systems (e.g. Raspberry Pi), use a 10K resistor on
# the RX pin (TX on the printer, green wire), or simply leave unconnected.
#
# Adafruit invests time and resources providing this open source code.
# Please support Adafruit and open-source hardware by purchasing products
# from Adafruit!
#
# Written by Limor Fried/Ladyada for Adafruit Industries.
# Python port by Phil Burgess for Adafruit Industries.
# MIT license, all text above must be included in any redistribution.
#*************************************************************************
# This is pretty much a 1:1 direct Python port of the Adafruit_Thermal
# library for Arduino. All methods use the same naming conventions as the
# Arduino library, with only slight changes in parameter behavior where
# needed. This should simplify porting existing Adafruit_Thermal-based
# printer projects to Raspberry Pi, BeagleBone, etc. See printertest.py
# for an example.
#
# One significant change is the addition of the printImage() function,
# which ties this to the Python Imaging Library and opens the door to a
# lot of cool graphical stuff!
#
# TO DO:
# - Might use standard ConfigParser library to put thermal calibration
# settings in a global configuration file (rather than in the library).
# - Make this use proper Python library installation procedure.
# - Trap errors properly. Some stuff just falls through right now.
# - Add docstrings throughout!
# Python 2.X code using the library usu. needs to include the next line:
from __future__ import print_function
from serial import Serial
import time
import sys
class Adafruit_Thermal(Serial):
resumeTime = 0.0
byteTime = 0.0
dotPrintTime = 0.0
dotFeedTime = 0.0
prevByte = '\n'
column = 0
maxColumn = 32
charHeight = 24
lineSpacing = 8
barcodeHeight = 50
printMode = 0
defaultHeatTime = 120
firmwareVersion = 268
writeToStdout = False
def __init__(self, *args, **kwargs):
# NEW BEHAVIOR: if no parameters given, output is written
# to stdout, to be piped through 'lp -o raw' (old behavior
# was to use default port & baud rate).
baudrate = 19200
if len(args) == 0:
self.writeToStdout = True
if len(args) == 1:
# If only port is passed, use default baud rate.
args = [ args[0], baudrate ]
elif len(args) == 2:
# If both passed, use those values.
baudrate = args[1]
# Firmware is assumed version 2.68. Can override this
# with the 'firmware=X' argument, where X is the major
# version number * 100 + the minor version number (e.g.
# pass "firmware=264" for version 2.64.
self.firmwareVersion = kwargs.get('firmware', 268)
if self.writeToStdout is False:
# Calculate time to issue one byte to the printer.
# 11 bits (not 8) to accommodate idle, start and
# stop bits. Idle time might be unnecessary, but
# erring on side of caution here.
self.byteTime = 11.0 / float(baudrate)
Serial.__init__(self, *args, **kwargs)
# Remainder of this method was previously in begin()
# The printer can't start receiving data immediately
# upon power up -- it needs a moment to cold boot
# and initialize. Allow at least 1/2 sec of uptime
# before printer can receive data.
self.timeoutSet(0.5)
self.wake()
self.reset()
# Description of print settings from p. 23 of manual:
# ESC 7 n1 n2 n3 Setting Control Parameter Command
# Decimal: 27 55 n1 n2 n3
# max heating dots, heating time, heating interval
# n1 = 0-255 Max heat dots, Unit (8dots), Default: 7 (64 dots)
# n2 = 3-255 Heating time, Unit (10us), Default: 80 (800us)
# n3 = 0-255 Heating interval, Unit (10us), Default: 2 (20us)
# The more max heating dots, the more peak current
# will cost when printing, the faster printing speed.
# The max heating dots is 8*(n1+1). The more heating
# time, the more density, but the slower printing
# speed. If heating time is too short, blank page
# may occur. The more heating interval, the more
# clear, but the slower printing speed.
heatTime = kwargs.get('heattime', self.defaultHeatTime)
self.writeBytes(
27, # Esc
55, # 7 (print settings)
11, # Heat dots
heatTime, # Lib default
40) # Heat interval
# Description of print density from p. 23 of manual:
# DC2 # n Set printing density
# Decimal: 18 35 n
# D4..D0 of n is used to set the printing density.
# Density is 50% + 5% * n(D4-D0) printing density.
# D7..D5 of n is used to set the printing break time.
# Break time is n(D7-D5)*250us.
# (Unsure of default values -- not documented)
printDensity = 10 # 100%
printBreakTime = 2 # 500 uS
self.writeBytes(
18, # DC2
35, # Print density
(printBreakTime << 5) | printDensity)
self.dotPrintTime = 0.03
self.dotFeedTime = 0.0021
else:
self.reset() # Inits some vars
# Because there's no flow control between the printer and computer,
# special care must be taken to avoid overrunning the printer's
# buffer. Serial output is throttled based on serial speed as well
# as an estimate of the device's print and feed rates (relatively
# slow, being bound to moving parts and physical reality). After
# an operation is issued to the printer (e.g. bitmap print), a
# timeout is set before which any other printer operations will be
# suspended. This is generally more efficient than using a delay
# in that it allows the calling code to continue with other duties
# (e.g. receiving or decoding an image) while the printer
# physically completes the task.
# Sets estimated completion time for a just-issued task.
def timeoutSet(self, x):
self.resumeTime = time.time() + x
# Waits (if necessary) for the prior task to complete.
def timeoutWait(self):
if self.writeToStdout is False:
while (time.time() - self.resumeTime) < 0: pass
# Printer performance may vary based on the power supply voltage,
# thickness of paper, phase of the moon and other seemingly random
# variables. This method sets the times (in microseconds) for the
# paper to advance one vertical 'dot' when printing and feeding.
# For example, in the default initialized state, normal-sized text
# is 24 dots tall and the line spacing is 32 dots, so the time for
# one line to be issued is approximately 24 * print time + 8 * feed
# time. The default print and feed times are based on a random
# test unit, but as stated above your reality may be influenced by
# many factors. This lets you tweak the timing to avoid excessive
# delays and/or overrunning the printer buffer.
def setTimes(self, p, f):
# Units are in microseconds for
# compatibility with Arduino library
self.dotPrintTime = p / 1000000.0
self.dotFeedTime = f / 1000000.0
# 'Raw' byte-writing method
def writeBytes(self, *args):
if self.writeToStdout:
for arg in args:
sys.stdout.write(chr(arg))
else:
self.timeoutWait()
self.timeoutSet(len(args) * self.byteTime)
for arg in args:
super(Adafruit_Thermal, self).write(chr(arg))
# Override write() method to keep track of paper feed.
def write(self, *data):
for i in range(len(data)):
c = data[i]
if self.writeToStdout:
sys.stdout.write(c)
continue
if c != 0x13:
self.timeoutWait()
super(Adafruit_Thermal, self).write(c)
d = self.byteTime
if ((c == '\n') or
(self.column == self.maxColumn)):
# Newline or wrap
if self.prevByte == '\n':
# Feed line (blank)
d += ((self.charHeight +
self.lineSpacing) *
self.dotFeedTime)
else:
# Text line
d += ((self.charHeight *
self.dotPrintTime) +
(self.lineSpacing *
self.dotFeedTime))
self.column = 0
# Treat wrap as newline
# on next pass
c = '\n'
else:
self.column += 1
self.timeoutSet(d)
self.prevByte = c
# The bulk of this method was moved into __init__,
# but this is left here for compatibility with older
# code that might get ported directly from Arduino.
def begin(self, heatTime=defaultHeatTime):
self.writeBytes(
27, # Esc
55, # 7 (print settings)
11, # Heat dots
heatTime,
40) # Heat interval
def reset(self):
self.writeBytes(27, 64) # Esc @ = init command
self.prevByte = '\n' # Treat as if prior line is blank
self.column = 0
self.maxColumn = 32
self.charHeight = 24
self.lineSpacing = 6
self.barcodeHeight = 50
if self.firmwareVersion >= 264:
# Configure tab stops on recent printers
self.writeBytes(27, 68) # Set tab stops
self.writeBytes( 4, 8, 12, 16) # every 4 columns,
self.writeBytes(20, 24, 28, 0) # 0 is end-of-list.
# Reset text formatting parameters.
def setDefault(self):
self.online()
self.justify('L')
self.inverseOff()
self.doubleHeightOff()
self.setLineHeight(30)
self.boldOff()
self.underlineOff()
self.setBarcodeHeight(50)
self.setSize('s')
self.setCharset()
self.setCodePage()
def test(self):
self.write("Hello world!")
self.feed(2)
def testPage(self):
self.writeBytes(18, 84)
self.timeoutSet(
self.dotPrintTime * 24 * 26 +
self.dotFeedTime * (6 * 26 + 30))
def setBarcodeHeight(self, val=50):
if val < 1: val = 1
self.barcodeHeight = val
self.writeBytes(29, 104, val)
UPC_A = 0
UPC_E = 1
EAN13 = 2
EAN8 = 3
CODE39 = 4
I25 = 5
CODEBAR = 6
CODE93 = 7
CODE128 = 8
CODE11 = 9
MSI = 10
ITF = 11
CODABAR = 12
def printBarcode(self, text, type):
newDict = { # UPC codes & values for firmwareVersion >= 264
self.UPC_A : 65,
self.UPC_E : 66,
self.EAN13 : 67,
self.EAN8 : 68,
self.CODE39 : 69,
self.ITF : 70,
self.CODABAR : 71,
self.CODE93 : 72,
self.CODE128 : 73,
self.I25 : -1, # NOT IN NEW FIRMWARE
self.CODEBAR : -1,
self.CODE11 : -1,
self.MSI : -1
}
oldDict = { # UPC codes & values for firmwareVersion < 264
self.UPC_A : 0,
self.UPC_E : 1,
self.EAN13 : 2,
self.EAN8 : 3,
self.CODE39 : 4,
self.I25 : 5,
self.CODEBAR : 6,
self.CODE93 : 7,
self.CODE128 : 8,
self.CODE11 : 9,
self.MSI : 10,
self.ITF : -1, # NOT IN OLD FIRMWARE
self.CODABAR : -1
}
if self.firmwareVersion >= 264:
n = newDict[type]
else:
n = oldDict[type]
if n == -1: return
self.feed(1) # Recent firmware requires this?
self.writeBytes(
29, 72, 2, # Print label below barcode
29, 119, 3, # Barcode width
29, 107, n) # Barcode type
self.timeoutWait()
self.timeoutSet((self.barcodeHeight + 40) * self.dotPrintTime)
# Print string
if self.firmwareVersion >= 264:
# Recent firmware: write length byte + string sans NUL
n = len(text)
if n > 255: n = 255
if self.writeToStdout:
sys.stdout.write(chr(n))
for i in range(n):
sys.stdout.write(text[i])
else:
super(Adafruit_Thermal, self).write(chr(n))
for i in range(n):
super(Adafruit_Thermal,
self).write(text[i])
else:
# Older firmware: write string + NUL
if self.writeToStdout:
sys.stdout.write(text)
else:
super(Adafruit_Thermal, self).write(text)
self.prevByte = '\n'
# === Character commands ===
INVERSE_MASK = (1 << 1) # Not in 2.6.8 firmware (see inverseOn())
UPDOWN_MASK = (1 << 2)
BOLD_MASK = (1 << 3)
DOUBLE_HEIGHT_MASK = (1 << 4)
DOUBLE_WIDTH_MASK = (1 << 5)
STRIKE_MASK = (1 << 6)
def setPrintMode(self, mask):
self.printMode |= mask
self.writePrintMode()
if self.printMode & self.DOUBLE_HEIGHT_MASK:
self.charHeight = 48
else:
self.charHeight = 24
if self.printMode & self.DOUBLE_WIDTH_MASK:
self.maxColumn = 16
else:
self.maxColumn = 32
def unsetPrintMode(self, mask):
self.printMode &= ~mask
self.writePrintMode()
if self.printMode & self.DOUBLE_HEIGHT_MASK:
self.charHeight = 48
else:
self.charHeight = 24
if self.printMode & self.DOUBLE_WIDTH_MASK:
self.maxColumn = 16
else:
self.maxColumn = 32
def writePrintMode(self):
self.writeBytes(27, 33, self.printMode)
def normal(self):
self.printMode = 0
self.writePrintMode()
def inverseOn(self):
if self.firmwareVersion >= 268:
self.writeBytes(29, 66, 1)
else:
self.setPrintMode(self.INVERSE_MASK)
def inverseOff(self):
if self.firmwareVersion >= 268:
self.writeBytes(29, 66, 0)
else:
self.unsetPrintMode(self.INVERSE_MASK)
def upsideDownOn(self):
self.setPrintMode(self.UPDOWN_MASK)
def upsideDownOff(self):
self.unsetPrintMode(self.UPDOWN_MASK)
def doubleHeightOn(self):
self.setPrintMode(self.DOUBLE_HEIGHT_MASK)
def doubleHeightOff(self):
self.unsetPrintMode(self.DOUBLE_HEIGHT_MASK)
def doubleWidthOn(self):
self.setPrintMode(self.DOUBLE_WIDTH_MASK)
def doubleWidthOff(self):
self.unsetPrintMode(self.DOUBLE_WIDTH_MASK)
def strikeOn(self):
self.setPrintMode(self.STRIKE_MASK)
def strikeOff(self):
self.unsetPrintMode(self.STRIKE_MASK)
def boldOn(self):
self.setPrintMode(self.BOLD_MASK)
def boldOff(self):
self.unsetPrintMode(self.BOLD_MASK)
def justify(self, value):
c = value.upper()
if c == 'C':
pos = 1
elif c == 'R':
pos = 2
else:
pos = 0
self.writeBytes(0x1B, 0x61, pos)
# Feeds by the specified number of lines
def feed(self, x=1):
if self.firmwareVersion >= 264:
self.writeBytes(27, 100, x)
self.timeoutSet(self.dotFeedTime * self.charHeight)
self.prevByte = '\n'
self.column = 0
else:
# datasheet claims sending bytes 27, 100, <x> works,
# but it feeds much more than that. So, manually:
while x > 0:
self.write('\n')
x -= 1
# Feeds by the specified number of individual pixel rows
def feedRows(self, rows):
self.writeBytes(27, 74, rows)
self.timeoutSet(rows * dotFeedTime)
self.prevByte = '\n'
self.column = 0
def flush(self):
self.writeBytes(12) # ASCII FF
def setSize(self, value):
c = value.upper()
if c == 'L': # Large: double width and height
size = 0x11
self.charHeight = 48
self.maxColumn = 16
elif c == 'M': # Medium: double height
size = 0x01
self.charHeight = 48
self.maxColumn = 32
else: # Small: standard width and height
size = 0x00
self.charHeight = 24
self.maxColumn = 32
self.writeBytes(29, 33, size)
prevByte = '\n' # Setting the size adds a linefeed
# Underlines of different weights can be produced:
# 0 - no underline
# 1 - normal underline
# 2 - thick underline
def underlineOn(self, weight=1):
if weight > 2: weight = 2
self.writeBytes(27, 45, weight)
def underlineOff(self):
self.writeBytes(27, 45, 0)
def printBitmap(self, w, h, bitmap, LaaT=False):
rowBytes = (w + 7) / 8 # Round up to next byte boundary
if rowBytes >= 48:
rowBytesClipped = 48 # 384 pixels max width
else:
rowBytesClipped = rowBytes
# if LaaT (line-at-a-time) is True, print bitmaps
# scanline-at-a-time (rather than in chunks).
# This tends to make for much cleaner printing
# (no feed gaps) on large images...but has the
# opposite effect on small images that would fit
# in a single 'chunk', so use carefully!
if LaaT: maxChunkHeight = 1
else: maxChunkHeight = 255
i = 0
for rowStart in range(0, h, maxChunkHeight):
chunkHeight = h - rowStart
if chunkHeight > maxChunkHeight:
chunkHeight = maxChunkHeight
# Timeout wait happens here
self.writeBytes(18, 42, chunkHeight, rowBytesClipped)
for y in range(chunkHeight):
for x in range(rowBytesClipped):
if self.writeToStdout:
sys.stdout.write(
chr(bitmap[i]))
else:
super(Adafruit_Thermal,
self).write(chr(bitmap[i]))
i += 1
i += rowBytes - rowBytesClipped
self.timeoutSet(chunkHeight * self.dotPrintTime)
self.prevByte = '\n'
# Print Image. Requires Python Imaging Library. This is
# specific to the Python port and not present in the Arduino
# library. Image will be cropped to 384 pixels width if
# necessary, and converted to 1-bit w/diffusion dithering.
# For any other behavior (scale, B&W threshold, etc.), use
# the Imaging Library to perform such operations before
# passing the result to this function.
def printImage(self, image, LaaT=False):
from PIL import Image
if image.mode != '1':
image = image.convert('1')
width = image.size[0]
height = image.size[1]
if width > 384:
width = 384
rowBytes = (width + 7) / 8
bitmap = bytearray(rowBytes * height)
pixels = image.load()
for y in range(height):
n = y * rowBytes
x = 0
for b in range(rowBytes):
sum = 0
bit = 128
while bit > 0:
if x >= width: break
if pixels[x, y] == 0:
sum |= bit
x += 1
bit >>= 1
bitmap[n + b] = sum
self.printBitmap(width, height, bitmap, LaaT)
# Take the printer offline. Print commands sent after this
# will be ignored until 'online' is called.
def offline(self):
self.writeBytes(27, 61, 0)
# Take the printer online. Subsequent print commands will be obeyed.
def online(self):
self.writeBytes(27, 61, 1)
# Put the printer into a low-energy state immediately.
def sleep(self):
self.sleepAfter(1) # Can't be 0, that means "don't sleep"
# Put the printer into a low-energy state after
# the given number of seconds.
def sleepAfter(self, seconds):
if self.firmwareVersion >= 264:
self.writeBytes(27, 56, seconds & 0xFF, seconds >> 8)
else:
self.writeBytes(27, 56, seconds)
def wake(self):
self.timeoutSet(0)
self.writeBytes(255)
if self.firmwareVersion >= 264:
time.sleep(0.05) # 50 ms
self.writeBytes(27, 118, 0) # Sleep off (important!)
else:
for i in range(10):
self.writeBytes(27)
self.timeoutSet(0.1)
# Empty method, included for compatibility
# with existing code ported from Arduino.
def listen(self):
pass
# Check the status of the paper using the printers self reporting
# ability. Doesn't match the datasheet...
# Returns True for paper, False for no paper.
def hasPaper(self):
if self.firmwareVersion >= 264:
self.writeBytes(27, 118, 0)
else:
self.writeBytes(29, 114, 0)
# Bit 2 of response seems to be paper status
stat = ord(self.read(1)) & 0b00000100
# If set, we have paper; if clear, no paper
return stat == 0
def setLineHeight(self, val=32):
if val < 24: val = 24
self.lineSpacing = val - 24
# The printer doesn't take into account the current text
# height when setting line height, making this more akin
# to inter-line spacing. Default line spacing is 32
# (char height of 24, line spacing of 8).
self.writeBytes(27, 51, val)
CHARSET_USA = 0
CHARSET_FRANCE = 1
CHARSET_GERMANY = 2
CHARSET_UK = 3
CHARSET_DENMARK1 = 4
CHARSET_SWEDEN = 5
CHARSET_ITALY = 6
CHARSET_SPAIN1 = 7
CHARSET_JAPAN = 8
CHARSET_NORWAY = 9
CHARSET_DENMARK2 = 10
CHARSET_SPAIN2 = 11
CHARSET_LATINAMERICA = 12
CHARSET_KOREA = 13
CHARSET_SLOVENIA = 14
CHARSET_CROATIA = 14
CHARSET_CHINA = 15
# Alters some chars in ASCII 0x23-0x7E range; see datasheet
def setCharset(self, val=0):
if val > 15: val = 15
self.writeBytes(27, 82, val)
CODEPAGE_CP437 = 0 # USA, Standard Europe
CODEPAGE_KATAKANA = 1
CODEPAGE_CP850 = 2 # Multilingual
CODEPAGE_CP860 = 3 # Portuguese
CODEPAGE_CP863 = 4 # Canadian-French
CODEPAGE_CP865 = 5 # Nordic
CODEPAGE_WCP1251 = 6 # Cyrillic
CODEPAGE_CP866 = 7 # Cyrillic #2
CODEPAGE_MIK = 8 # Cyrillic/Bulgarian
CODEPAGE_CP755 = 9 # East Europe, Latvian 2
CODEPAGE_IRAN = 10
CODEPAGE_CP862 = 15 # Hebrew
CODEPAGE_WCP1252 = 16 # Latin 1
CODEPAGE_WCP1253 = 17 # Greek
CODEPAGE_CP852 = 18 # Latin 2
CODEPAGE_CP858 = 19 # Multilingual Latin 1 + Euro
CODEPAGE_IRAN2 = 20
CODEPAGE_LATVIAN = 21
CODEPAGE_CP864 = 22 # Arabic
CODEPAGE_ISO_8859_1 = 23 # West Europe
CODEPAGE_CP737 = 24 # Greek
CODEPAGE_WCP1257 = 25 # Baltic
CODEPAGE_THAI = 26
CODEPAGE_CP720 = 27 # Arabic
CODEPAGE_CP855 = 28
CODEPAGE_CP857 = 29 # Turkish
CODEPAGE_WCP1250 = 30 # Central Europe
CODEPAGE_CP775 = 31
CODEPAGE_WCP1254 = 32 # Turkish
CODEPAGE_WCP1255 = 33 # Hebrew
CODEPAGE_WCP1256 = 34 # Arabic
CODEPAGE_WCP1258 = 35 # Vietnam
CODEPAGE_ISO_8859_2 = 36 # Latin 2
CODEPAGE_ISO_8859_3 = 37 # Latin 3
CODEPAGE_ISO_8859_4 = 38 # Baltic
CODEPAGE_ISO_8859_5 = 39 # Cyrillic
CODEPAGE_ISO_8859_6 = 40 # Arabic
CODEPAGE_ISO_8859_7 = 41 # Greek
CODEPAGE_ISO_8859_8 = 42 # Hebrew
CODEPAGE_ISO_8859_9 = 43 # Turkish
CODEPAGE_ISO_8859_15 = 44 # Latin 3
CODEPAGE_THAI2 = 45
CODEPAGE_CP856 = 46
CODEPAGE_CP874 = 47
# Selects alt symbols for 'upper' ASCII values 0x80-0xFF
def setCodePage(self, val=0):
if val > 47: val = 47
self.writeBytes(27, 116, val)
# Copied from Arduino lib for parity; may not work on all printers
def tab(self):
self.writeBytes(9)
self.column = (self.column + 4) & 0xFC
# Copied from Arduino lib for parity; may not work on all printers
def setCharSpacing(self, spacing):
self.writeBytes(27, 32, spacing)
# Overloading print() in Python pre-3.0 is dirty pool,
# but these are here to provide more direct compatibility
# with existing code written for the Arduino library.
def print(self, *args, **kwargs):
for arg in args:
self.write(str(arg))
# For Arduino code compatibility again
def println(self, *args, **kwargs):
for arg in args:
self.write(str(arg))
self.write('\n')
- adafruit2
- Posts: 22149
- Joined: Fri Mar 11, 2005 7:36 pm
Re: thermal printer feed does not work properly, neither bit
could be a flow control thing...but we dont have a solution :/
- zooto68
- Posts: 15
- Joined: Thu Feb 05, 2009 12:54 pm
Re: thermal printer feed does not work properly, neither bit
I fixed this by changing this line:
#define printBreakTime 8 // 500 uS
from 15 to 8
in the library .cpp file
#define printBreakTime 8 // 500 uS
from 15 to 8
in the library .cpp file
Please be positive and constructive with your questions and comments.