doc: update README.devices for Meterman 38XR (RS232 button)

diff --git a/README.devices b/README.devices
index fc0e64057384effd7f9a7329dbaf147d0792d916..f72b29e7e94a061e69f0fd4b9aceb8fae21d5e32 100644 (file)
--- a/README.devices
+++ b/README.devices
@@ -408,6 +408,7 @@ a short list for convenience:
  - GW Instek VCP: See the discussion on manual driver assignment to common
    USB to UART chips with non-default USB identification.
  - MASTECH MS6514: Press the "Setup/PC-Link" button for roughly 3 seconds.
+ - Meterman 38XR: Press the "RS232" button.
  - Metrix MX56C: Press the PRINT button to have the meter send acquisition
    data via IR. Hold the PRINT button to adjust the meter's transmission
    interval.