updated readme

readme.md

@@ -6,21 +6,20 @@
 - 868MHz PCB antenna, can be cut off and replaced by an SMA connector
 - AA size lithium battery driven: (LS14500 Lithium-Thionyl-Chlorid or LifePo4 possible)
 - Boost converter to supply sensors with stable 5V. Can be switched off for low current sleep mode
-- External connectors for Onewire, two analog inputs and I2C including ESD protection with very low current TVS diodes
+- External connector for Onewire, analog inputs and I2C including ESD protection with very low current TVS diodes
 - Sensing battery voltage. Can be disabled for low sleep current
 - Red led for signaling activity
 - Mechanical switch to select battery of external power supply 
-
 - Separate removable pcb section with wide range power supply 5 - 25V,  USB-C connector and USB-UART adapter for programming
 
 
 ## 3D Preview 
 ![3D Preview](media/3d_front.JPG)
 
-![3D Preview](media/3d_back.jpg)
+![3D Preview](media/3d_back.JPG)
 
-## Pin Mapping tested pins:   
 
+## Pin Mapping ESP32
 - AnalogInput1 : PIN13  GPIO14  ADC2_CH6
 - Analog Bat   : PIN16  GPIO13  ADC2_CH4 
 - AnalogInput2 : PIN11 GPIO26   ADC2_CH9
@@ -30,17 +29,20 @@
 - UART2_TX     : PIN28 GPIO17 		 
 - 5V Buck EN   : PIN12 GPIO27 		
 - LED_Signal   : PIN9 GPIO33
-
 - RFM_MISO     : PIN31  GPIO19 
 - RFM_MOSI     : PIN37  GPIO23 
 - RFM_SCK      : PIN30  GPIO18
 - RFM_CS       : PIN29  GPIO5
 - RFM_RST      : PIN23  GPIO15 
 - RFM_IRQ      : PIN26  GPIO4 
 
+
 ## Links
+- Antenna Design: https://github.com/cernohorsky/LoRa-Node  
+- Selected soil sensor: https://de.aliexpress.com/item/1005001411485735.html?gatewayAdapt=glo2deu&spm=a2g0o.9042311.0.0.27424c4dQoBMf8 Supplyvoltage 3.6V - 30V.    Two analog outputs  0 to 2 V  for  soil temperature and soil humidity. ~5mA current consumption at 4V 
+
 
-### Humidity Sensors:
+### Oher Links for reference
 https://www.metergroup.com/de/environment/produkte/teros-21/
 
 https://www.metergroup.com/de/environment/produkte/teros-10/
@@ -57,11 +59,4 @@ https://www.delta-t.co.uk/product/sm150t/
 
 https://de.aliexpress.com/item/32793236869.html?spm=a2g0s.8937460.0.0.3a672e0eRfM3vv
 
-- Antenna Design: https://github.com/cernohorsky/LoRa-Node  
-
-- Usefull for pin mapping: https://www.electroniclinic.com/esp32-wroom-32d-pinout-features-and-specifications/ 
-
-### Selected sensor for hardware design:
-- https://de.aliexpress.com/item/1005001411485735.html?gatewayAdapt=glo2deu&spm=a2g0o.9042311.0.0.27424c4dQoBMf8
-- Supplyvoltage 3.6V - 30V.    Two analog outputs  0 .. 2 V  for  soil temperature and soil humidity. ~5mA current consumption at 4V 
-
+- Usefull for pin mapping: https://www.electroniclinic.com/esp32-wroom-32d-pinout-features-and-specifications/