From ca0029ecb0d9ee1acd9a19b4eb69815e48049a44 Mon Sep 17 00:00:00 2001
From: Christian Zufferey <christian@zufferey.com>
Date: Sun, 15 Dec 2019 22:42:26 +0100
Subject: [PATCH] =?UTF-8?q?Incroyable=20apr=C3=A8s=20deux=20jours=20non=20?=
 =?UTF-8?q?stop=20pas=20moyen=20de=20faire=20fonctionner=20le=20module=20H?=
 =?UTF-8?q?TU21D=20de=20mesure=20d'humidit=C3=A9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Mesures/humidity/bolo/0_get_data.lua | 42 ++++++++++++++++-------
 Mesures/humidity/bolo/a.lua          | 50 +++++++++++++++++++++++++++-
 2 files changed, 79 insertions(+), 13 deletions(-)

diff --git a/Mesures/humidity/bolo/0_get_data.lua b/Mesures/humidity/bolo/0_get_data.lua
index fbcb5ba..d6056bc 100644
--- a/Mesures/humidity/bolo/0_get_data.lua
+++ b/Mesures/humidity/bolo/0_get_data.lua
@@ -1,11 +1,12 @@
 -- Lit le capteur I2C HTU21D de mesure d'humidité et de température
-print("\n 0_get_data.lua zf191215.1758 \n")
+print("\n 0_get_data.lua zf191215.2057 \n")
 
 -- https://cdn-shop.adafruit.com/datasheets/1899_HTU21D.pdf
 -- Comparaison DHT22, AM2302, AM2320, AM2321, SHT71, HTU21D, Si7021, BME280
 -- http://www.kandrsmith.org/RJS/Misc/Hygrometers/calib_many.html
 -- Il est compatible avec le capteur SI7021 mais pas avec la lib SI7021 du NodeMCU Lua :-(
 
+-- http://electromag1.wifeo.com/capteurs-de-temperature-et-humidite-gy-21-et-si7021.php
 -- source: https://github.com/famzah/nodemcu/tree/master/HTU21D-TLS
 -- source2: https://github.com/tebben/NodeMCU
 -- source3: https://github.com/codywon/NodeMCU-2
@@ -15,7 +16,7 @@ id = 0
 sda = 1
 scl = 2
 addr = 0x40
-HUMIDITY = 0xE3
+HUMIDITY = 0xE5
 TEMPERATURE = 0xE3
 SOFTRESET = 0xFE
 
@@ -23,23 +24,40 @@ trig = 4
 gpio.mode(trig, gpio.OUTPUT)
 gpio.write(trig, gpio.HIGH)
 
-i2c.setup(id, sda, scl, i2c.FAST)
 
+i2c.setup(id, sda, scl, i2c.SLOW)
 i2c.start(id)
+tmr.delay(1*1000)
+
+i2c.address(id, addr, i2c.TRANSMITTER)
+i2c.write(id, SOFTRESET)
+tmr.delay(20*1000)
+
+
 i2c.address(id, addr, i2c.TRANSMITTER)
 i2c.write(id, HUMIDITY)
---print("ack: ",zerr)
-
-
 i2c.address(id, addr, i2c.RECEIVER)
+tmr.delay(50*1000)
+
+gpio.write(trig, gpio.LOW)
+tmr.delay(0.1*1000)
+gpio.write(trig, gpio.HIGH)
+
+r = i2c.read(id,3)
+print(string.byte(r))
+print(string.byte(r,2))
+print(string.byte(r,3))
+
+
+
+--i2c.address(id, addr, i2c.RECEIVER)
+
+--[[
 i2c.stop(id)
 
 
 tmr.delay(17*1000)
 
-gpio.write(trig, gpio.LOW)
-tmr.delay(1*1000)
-gpio.write(trig, gpio.HIGH)
 
 i2c.start(id)
 r = i2c.read(id,3)
@@ -48,7 +66,7 @@ i2c.stop(id)
 print(string.byte(r))
 print(string.byte(r,2))
 print(string.byte(r,3))
+]]
 
-
-
-
+tmr.delay(1*1000)
+i2c.stop(id)
diff --git a/Mesures/humidity/bolo/a.lua b/Mesures/humidity/bolo/a.lua
index e4a6450..b4bdd59 100644
--- a/Mesures/humidity/bolo/a.lua
+++ b/Mesures/humidity/bolo/a.lua
@@ -1,3 +1,51 @@
+print("\n a.lua zf191215.2112 \n")
+
+t2 = 1234
+
 trig = 4
 gpio.mode(trig, gpio.OUTPUT)
-gpio.write(trig, gpio.LOW)
+gpio.write(trig, gpio.HIGH)
+
+
+id = 0
+sda = 1
+scl = 2
+addr = 0x40
+
+r = ""
+HUMIDITY = 0xE5
+TEMPERATURE = 0xE3
+
+
+function readHumi()
+    i2c.start(id)
+    i2c.address(id, addr, i2c.TRANSMITTER)
+    i2c.write(id, HUMIDITY)
+    i2c.stop(id)
+    i2c.start(id)
+    i2c.address(id, addr, i2c.RECEIVER)
+    tmr.delay(20000)
+    
+    gpio.write(trig, gpio.LOW)
+    tmr.delay(10)
+    gpio.write(trig, gpio.HIGH)
+    
+    r = i2c.read(id,3)
+    i2c.stop(id)
+    print(r)
+    return (bit.band((bit.lshift(string.byte(r,1),8)+string.byte(r,2)),0xfffc)*12500)/65536-600
+end
+
+
+function getHumidity()
+    return tonumber(string.format("%.1f", tostring(readHumi()/100)))
+end
+
+tmr.delay(15000)
+i2c.setup(id, sda, scl, i2c.SLOW)
+tmr.delay(15000)
+
+t2 = getHumidity()
+print("Humidity: "..t2.." %")
+
+