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[core] Improve log timestamp accuracy by batching serial reads

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This commit is contained in:
J. Nick Koston
2025-12-29 20:59:03 -10:00
parent 4c16afeacb
commit 21bd6c5b18
1 changed files with 22 additions and 14 deletions
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esphome/__main__.py
+22 -14
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@@ -431,25 +431,33 @@ def run_miniterm(config: ConfigType, port: str, args) -> int:
while tries < 5:
try:
with ser:
buffer = b""
ser.timeout = 0.1 # 100ms timeout for non-blocking reads
while True:
try:
raw = ser.readline()
# Read all available data and timestamp it
chunk = ser.read(ser.in_waiting or 1)
if not chunk:
continue
time_ = datetime.now()
nanoseconds = time_.microsecond // 1000
time_str = f"[{time_.hour:02}:{time_.minute:02}:{time_.second:02}.{nanoseconds:03}]"
# Add to buffer and process complete lines
buffer += chunk
while b"\n" in buffer:
raw_line, buffer = buffer.split(b"\n", 1)
line = raw_line.replace(b"\r", b"").decode(
"utf8", "backslashreplace"
)
safe_print(parser.parse_line(line, time_str))
backtrace_state = platformio_api.process_stacktrace(
config, line, backtrace_state=backtrace_state
)
except serial.SerialException:
_LOGGER.error("Serial port closed!")
return 0
line = (
raw.replace(b"\r", b"")
.replace(b"\n", b"")
.decode("utf8", "backslashreplace")
)
time_ = datetime.now()
nanoseconds = time_.microsecond // 1000
time_str = f"[{time_.hour:02}:{time_.minute:02}:{time_.second:02}.{nanoseconds:03}]"
safe_print(parser.parse_line(line, time_str))
backtrace_state = platformio_api.process_stacktrace(
config, line, backtrace_state=backtrace_state
)
except serial.SerialException:
tries += 1
time.sleep(1)