Moved printing into its own separate project called frank. It also has its own toml and deployement system.

It also works on a raspberry pi

frank/printing.py

@@ -0,0 +1,38 @@
+import re  # noqa: F401
+import socket  # noqa: F401
+import sys  # noqa: F401
+
+from arq import Retry
+
+
+async def sent_to_printer(ctx: dict, data: str, address: str, cut_code: str):
+    address = "/printer"
+    try:
+        print("Printing to :", address, "\n", data, "\n")
+        with open(address, "w") as printer:
+            printer.write(data)
+            printer.write("\n")
+            print(cut_code)
+            printer.write(cut_code)
+    except LookupError as e:
+        print("Lookup error:", e)
+        raise Retry(defer=ctx["job_try"] * 30)
+    except FileNotFoundError as e:
+        print("File not found error:", e)
+        raise Retry(defer=ctx["job_try"] * 30)
+    except:  # noqa: E722
+        print("Unexpected error:", sys.exc_info()[0])
+        # retry the job with increasing back-off
+        # delays will be 5s, 10s, 15s, 20s
+        # after max_tries (default 5) the job will permanently fail
+        raise Retry(defer=ctx["job_try"] * 30)
+
+    # GS = "\x1d"
+    # PAPER_CUT = GS + "V"
+    # # For the printer ESC/POS Reference
+    # # https://reference.epson-biz.com/modules/ref_escpos/index.php?content_id=87
+    # # The m codes are in decimal and can be converted using the following table
+    # # https://www.eso.org/~ndelmott/ascii.html
+    # # The \x03 in all the following is to feed 3 lines before cut it can be increased or reduced
+    # FUNCTION_B_FULL_CUT = "\x41\x03"
+    # FUNCTION_B_PARTIAL_CUT = "\x42\x03"