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Read-Sensor-Resistances
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The votage can be changed by user

This commit is contained in:
Zheng Liu 2023-04-16 15:32:18 -07:00
parent adf70dbd08
commit 541d6abc1f
1 changed files with 5 additions and 4 deletions
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9
read_arduino.py
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@ -23,6 +23,7 @@ def read():
file_name = settings["file_name"] file_name = settings["file_name"]
port = settings["port"] port = settings["port"]
delay = settings["delay"] delay = settings["delay"]
if np.any(sensor_ports >= SENSORS_MAX): if np.any(sensor_ports >= SENSORS_MAX):
raise ValueError("Port range is 0-3!") raise ValueError("Port range is 0-3!")
@ -46,9 +47,9 @@ def read():
while True: while True:
dat_list = np.random.randint(0, v_in * 1000, SENSORS_MAX) # create a randomized voltage data dat_list = np.random.randint(0, v_in * 1000, SENSORS_MAX) # create a randomized voltage data
# take only the nonzero indices, and truncated to two decimal places to "filter" out some hardware errors # take only the nonzero indices, and truncated to two decimal places to "filter" out some hardware errors
# According to the actual req, the data in the data list should be (3.3-data) # According to the actual req, the data in the data list should be (v_in-data)
for x in range(dat_list.size): for x in range(dat_list.size):
np.put(dat_list, x, 3.3 - dat_list[x]) np.put(dat_list, x, v_in - dat_list[x])
dat_sel = np.trunc((np.take(dat_list, sensor_ports) / 1000) * 10**2) / 10**2 dat_sel = np.trunc((np.take(dat_list, sensor_ports) / 1000) * 10**2) / 10**2
r_arr = np.take(refRes, sensor_ports) * (v_in / dat_sel - 1) # *2 <-- change with actual formula for ammonia concentration r_arr = np.take(refRes, sensor_ports) * (v_in / dat_sel - 1) # *2 <-- change with actual formula for ammonia concentration
# created a new array to convert resistance values to sci notation # created a new array to convert resistance values to sci notation
@ -88,9 +89,9 @@ def read():
print(read_data) # Debug print(read_data) # Debug
# use numpy so it can make list calculations easier (and possibly faster) # use numpy so it can make list calculations easier (and possibly faster)
dat_list = np.asarray(json.loads(read_data), dtype=np.float32)[:SENSORS_MAX] dat_list = np.asarray(json.loads(read_data), dtype=np.float32)[:SENSORS_MAX]
# According to the actual req, the data in the data list should be (3.3-data) # According to the actual req, the data in the data list should be (votage-data)
for x in range(dat_list.size): for x in range(dat_list.size):
np.put(dat_list, x, 3.3 - dat_list[x]) np.put(dat_list, x, v_in - dat_list[x])
dat_sel = np.take(dat_list, sensor_ports) dat_sel = np.take(dat_list, sensor_ports)
# if we decided to switch back to analogRead(), replace this line of comment to the algorithm to something like the commented line below # if we decided to switch back to analogRead(), replace this line of comment to the algorithm to something like the commented line below
# dat_sel = np.take(dat_list, sensor_ports) * v_in / resolution # dat_sel = np.take(dat_list, sensor_ports) * v_in / resolution