diff --git a/doc/erko_howto_tools.txt b/doc/erko_howto_tools.txt
index ecf00b7050a7421a5792a1ec78b30b34dfeb246c..f03a9f9c1e1fd1ff9fd23649dade7c10964fe5bd 100755
--- a/doc/erko_howto_tools.txt
+++ b/doc/erko_howto_tools.txt
@@ -421,8 +421,24 @@ sdp_rw.py --host localhost --port 4840 -r firmware_version
 
 
 From ASTRON l2TS can be reached directly, because LCU2 is in ASTRON network:
-
-sdp_rw.py --host 10.151.255.1 --port 4842 -r firmware_version
+E.g. from my laptop dop466:
+:kooistra@dop466:/dop466_0/kooistra$ mystep
+✔ Provisioner: keycloak (OIDC) [client: step-ca]
+Your default web browser has been opened to visit:
+
+https://keycloak.astron.nl/auth/realms/Smallstep/protocol/openid-connect/auth?client_id=step-ca&code_challenge=0kDZZJfV-rEA-XSFpqP5ANGZosDuNzv_PRMEW9Cru6U&code_challenge_method=S256&nonce=70b6d03da47641eee4fe5b44de3f983403e4ee39775bc65783576928b1cf98e0&redirect_uri=http%3A%2F%2F127.0.0.1%3A10000&response_type=code&scope=openid+email&state=05cdsy8XYVT3hCRMXh6axT00myb9ZjGi
+
+✔ CA: https://smallstep.astron.nl
+✔ SSH Agent: yes
+:kooistra@dop466:/dop466_0/kooistra$ cd git/sdptr/
+:kooistra@dop466:/dop466_0/kooistra/git/sdptr$ . ./init_sdptr.sh
+SDPTR_DIR environment will be setup for /dop466_0/kooistra/git/sdptr
+:kooistra@dop466:/dop466_0/kooistra/git/sdptr$ sdp_rw.py --host 10.151.255.1 --port 4842 -r firmware_version
+read firmware_version:
+node 16:  2023-09-16T18.27.54_4b45e10a4_lofar2_unb2c_sdp_station_full
+node 17:  2023-09-16T18.27.54_4b45e10a4_lofar2_unb2c_sdp_station_full
+node 18:  2023-09-16T18.27.54_4b45e10a4_lofar2_unb2c_sdp_station_full
+node 19:  2023-09-16T18.27.54_4b45e10a4_lofar2_unb2c_sdp_station_full
 
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 * RadioHDL with SVN