hx71x: Load Cell Skeleton and HX71x bulk ADC

* Create the load_cell host module skeleton to create the sensors and start taking samples.
* Add support for the HX717 and HX711 ADC sensors.

Signed-off-by: Gareth Farrington <gareth@waves.ky>

1 files changed, 15 insertions, 0 deletions

diff --git a/docs/API_Server.md b/docs/API_Server.md
index cc0922e3..36d67b1a 100644
--- a/docs/API_Server.md
+++ b/docs/API_Server.md
@@ -364,6 +364,21 @@ and might later produce asynchronous messages such as:
 The "header" field in the initial query response is used to describe
 the fields found in later "data" responses.
 
+### hx71x/dump_hx71x
+
+This endpoint is used to subscribe to raw HX711 and HX717 ADC data.
+Obtaining these low-level ADC updates may be useful for diagnostic
+and debugging purposes. Using this endpoint may increase Klipper's
+system load.
+
+A request may look like:
+`{"id": 123, "method":"hx71x/dump_hx71x",
+"params": {"sensor": "load_cell", "response_template": {}}}`
+and might return:
+`{"id": 123,"result":{"header":["time","counts"]}}`
+and might later produce asynchronous messages such as:
+`{"params":{"data":[[3292.432935, 562534], [3292.4394937, 5625322]]}}`
+
 ### pause_resume/cancel
 
 This endpoint is similar to running the "PRINT_CANCEL" G-Code command.