temp: Slow down reports

Only send a new report every 200ms to hopefully mitigate the serial port
glitches.

Misc/Temp-Monitor/main.py

@@ -0,0 +1 @@
+import temperature_monitor

Misc/Temp-Monitor/temperature_monitor.py

@@ -1,4 +1,5 @@
 import math
+import time
 from cs1237 import CS1237
 from machine import Pin
 
@@ -10,7 +11,7 @@ ADC_RATE = 40
 cs1237 = CS1237(clock, data)
 cs1237.config(gain=1, rate=ADC_RATE)
 
-print(repr(cs1237.get_config()))
+cs1237.get_config()
 
 THERMISTOR_BETA = 3950.0
 THERMISTOR_R25 = 10e3
@@ -22,6 +23,7 @@ FILTER_RC = 1
 FILTER_A = 1 / ADC_RATE / (FILTER_RC / 1 / ADC_RATE)
 
 temperature_filtered = 25
+last_report = time.ticks_ms()
 while True:
     raw_value = cs1237.read()
     value = float(raw_value) / (2**24 - 1)
@@ -37,4 +39,8 @@ while True:
         temperature_filtered * (1 - FILTER_A) + temperature * FILTER_A
     )
 
-    print(temperature_filtered)
+    now = time.ticks_ms()
+    elapsed = now - last_report
+    if elapsed >= 200 or elapsed < 0:
+        print(f"{temperature_filtered:.6f}")
+        last_report = now