From 0b90fb7fd27546e047817969b8a653b7c1e6b7e1 Mon Sep 17 00:00:00 2001
From: Jan Grewe <jan@faked.org>
Date: Sun, 10 Mar 2024 23:16:20 +0100
Subject: [PATCH] fix pH calculation
---
packages/water_ph.yaml | 28 +++++++---------------------
1 file changed, 7 insertions(+), 21 deletions(-)
diff --git a/packages/water_ph.yaml b/packages/water_ph.yaml
index c774d1d..b38ffba 100644
--- a/packages/water_ph.yaml
+++ b/packages/water_ph.yaml
@@ -13,10 +13,6 @@ globals:
type: float
restore_value: yes
initial_value: ${ph700_raw}
- - id: ph686_raw # raw V value from probe using pH 6.86 calibration solution.
- type: float
- restore_value: yes
- initial_value: ${ph686_raw}
- id: ph918_raw # raw V value from probe using pH 9.18 calibration solution.
type: float
restore_value: yes
@@ -40,12 +36,6 @@ sensor:
# update_interval: 5s
# lambda: !lambda return id(ph400_raw);
# - platform: template
- # name: "pH: 6.86 Calibration Value"
- # unit_of_measurement: "V"
- # accuracy_decimals: 5
- # update_interval: 5s
- # lambda: !lambda return id(ph686_raw);
- # - platform: template
# name: "pH: 7.00 Calibration Value"
# unit_of_measurement: "V"
# accuracy_decimals: 5
@@ -65,20 +55,22 @@ sensor:
update_interval: 5s
lambda: |-
float slope;
+ float intersect;
if (id(ph_slope_points).active_index() == 1) {
- slope = (id(ph918_raw) - id(ph400_raw)) / (9.18 - 4.00);
+ slope = (9.18 - 4.0) / ((id(ph918_raw)-1.5) / 3.0 - (id(ph400_raw)-1.5) / 3.0);
+ intersect = 9.18 - slope * (id(ph918_raw)-1.5) / 3.0;
} else {
- slope = (id(ph700_raw) - id(ph400_raw)) / (7.00 - 4.00);
+ slope = (7.0 - 4.0) / ((id(ph700_raw)-1.5) / 3.0 - (id(ph400_raw)-1.5) / 3.0);
+ intersect = 7.0 - slope * (id(ph700_raw)-1.5) / 3.0;
}
- float intersect = id(ph686_raw) - (slope * 6.86);
- return (id(analog_ph).state - intersect) / slope;
+ return slope * (id(analog_ph).state-1.5) / 3.0 + intersect;
select:
- platform: template
id: ph_slope_points
name: "pH: Calibration Points"
options: ["4.00/7.00", "4.00/9.18"]
- initial_option: "4.00/7.00"
+ initial_option: "4.00/9.18"
optimistic: true
restore_value: true
@@ -89,12 +81,6 @@ button:
- globals.set:
id: ph400_raw
value: !lambda return id(analog_ph).state;
- - platform: template
- name: "pH: Calibrate 6.86"
- on_press:
- - globals.set:
- id: ph686_raw
- value: !lambda return id(analog_ph).state;
- platform: template
name: "pH: Calibrate 7.00"
on_press:
--
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