Updated First steps into APRS over LoRa (markdown)

First-steps-into-APRS-over-LoRa.md

@@ -5,15 +5,15 @@ Client APRS terminal is headless ESP32-WROOM based KISS serial bluetooth modem w
 
 APRS LoRa iGate is a full standalone ESP32 iGate with RX/TX and digipeating support. It is capable of forwarding APRS packets from LoRa RF into APRS-IS network and vise versa. Plus, it supports digipeating to support larger coverage. Connectivity to Internet and APRS-IS server is done through WiFi connection natively supported by ESP32 platform.
 
-# Bands of pperation
+# Bands of operation
 There are several bands, where different LoRa modules could operate:
-- **~160-173.5 MHz**, untested, outside of amateur and ISM radio band plans, not possible to use
-- **~410-480 MHz**, 433.775 MHz is the center of operation inside the amateur radio band plan in IARU1 region (EU/US) 
+- [✗] **~160-173.5 MHz**, untested, outside of amateur and ISM radio band plans, not possible to use
+- [✓] **~410-480 MHz**, 433.775 MHz is the center of operation inside the amateur radio band plan in IARU1 region (EU/US) 
   - frequency of operation is choosen based on proposal from https://vienna.iaru-r1.org/wp-content/uploads/2019/01/VIE19-C5-015-OEVSV-LORA-APRS-433-MHz.pdf
-  - maximum bandwidth in IARU1 region for 433 MHz band is limited to 20 KHz, which requires stable TXCO sources or automatic frequency correction
-- **~868 MHz**, untested, outside of amateur radio band plan, but possible to run using ISM band plan
-- **~915 MHz**, untested, operation inside the amateur radio band plan in IARU2 region (US)
-- **~2400 MHz**, untested, inside the amateur band plan, also possible to run using ISM band plan
+  - maximum bandwidth in IARU1 region for 433 MHz band is limited to 20 KHz, which requires stable TXCO sources or automatic frequency correction, it might be also possible to run at 125 KHz depending on the region and local band plan
+- [✓] **~868 MHz**, untested, outside of amateur radio band plan, but possible to run using ISM band plan
+- [✓] **~915 MHz**, untested, operation inside the amateur radio band plan in IARU2 region (US)
+- [✓] **~2400 MHz**, untested, inside the amateur band plan, also possible to run using ISM band plan
 
 # Througput and signal levels
 LoRa modules support various SF (spreading factors) and various bandwidths, table below summarizes possible options, with the maximum reasonable speed and signal level:
@@ -23,6 +23,8 @@ LoRa modules support various SF (spreading factors) and various bandwidths, tabl
 
 ![](https://github.com/sh123/esp32_loraprs/blob/master/images/bandwidth_vs_sf.jpg)
 
+# ESP32 KISS bluetooth modem
+
 # Setting up LoRa Blueooth KISS modem for APRS usage
 
 # Setting up LoRa APRS gateway