X-Git-Url: https://vault307.fbx.one/gitweb/micorpython_ir.git/blobdiff_plain/639dbe8734879b1c2bd2ea353ab3089d722f8968..146e7a81c29ff28c5c81998b52eccb0d23582799:/README.md?ds=inline

diff --git a/README.md b/README.md
index 750a131..e2c10d8 100644
--- a/README.md
+++ b/README.md
@@ -5,8 +5,8 @@ a driver for IR "blaster" apps. The device drivers are nonblocking. They do not
 require `uasyncio` but are compatible with it, and are designed for standard
 firmware builds.
 
-The receiver is cross platform and has been tested on Pyboard, ESP8266 and
-ESP32.
+The receiver is cross platform and has been tested on Pyboard, ESP8266, ESP32
+and Raspberry Pi Pico.
 
 In a typical use case the receiver is employed at the REPL to sniff the address
 and data values associated with buttons on a remote control. The transmitter is
@@ -15,6 +15,14 @@ then used in an application to send those codes, emulating the remote control.
 Other use cases involve running the receiver in an application. This enables an
 IR remote to control a device such as a robot.
 
+## Raspberry Pi Pico note
+
+Early firmware has [this issue](https://github.com/micropython/micropython/issues/6866)
+affecting USB communication with some PC's. It particularly affects code which
+issues `print()` only occasionally: the application appears to have failed. The
+missing messages appear when you press a key. Hopefully this will be fixed soon
+(note dated 8th March 2021).
+
 #### [Receiver docs](./RECEIVER.md)
 
 The transmitter driver is compatible with Pyboard (1.x and D series) and ESP32.
@@ -90,20 +98,22 @@ proprietary protocols and are not supported by these drivers.
 
 # 4. References
 
-Sources of information about IR protocols.  
+Sources of information about IR protocols. The `sbprojects.net` site is an
+excellent resource.  
 [General information about IR](https://www.sbprojects.net/knowledge/ir/)
 
 The NEC protocol:  
 [altium](http://techdocs.altium.com/display/FPGA/NEC+Infrared+Transmission+Protocol)  
 [circuitvalley](http://www.circuitvalley.com/2013/09/nec-protocol-ir-infrared-remote-control.html)
+[sbprojects.net](https://www.sbprojects.net/knowledge/ir/nec.php)
 
 Philips protocols:  
-[RC5](https://en.wikipedia.org/wiki/RC-5)  
-[RC5](https://www.sbprojects.net/knowledge/ir/rc5.php)  
-[RC6](https://www.sbprojects.net/knowledge/ir/rc6.php)
+[RC5 Wikipedia](https://en.wikipedia.org/wiki/RC-5)  
+[RC5 sbprojects.net](https://www.sbprojects.net/knowledge/ir/rc5.php)  
+[RC6 sbprojects.net](https://www.sbprojects.net/knowledge/ir/rc6.php)
 
 Sony protocol:  
-[SIRC](https://www.sbprojects.net/knowledge/ir/sirc.php)
+[SIRC sbprojects.net](https://www.sbprojects.net/knowledge/ir/sirc.php)
 
 MCE protocol:  
 [OrtekMCE](http://www.hifi-remote.com/johnsfine/DecodeIR.html#OrtekMCE)